diff --git a/doc/api/deprecations.md b/doc/api/deprecations.md
index 607678ebbfba95..ce2872a3a9896e 100644
--- a/doc/api/deprecations.md
+++ b/doc/api/deprecations.md
@@ -964,6 +964,9 @@ The [`tls.SecurePair`][] class is deprecated. Please use
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -976,7 +979,7 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
 The [`util.isArray()`][] API is deprecated. Please use `Array.isArray()`
 instead.
@@ -985,6 +988,9 @@ instead.
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -997,14 +1003,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isBoolean()`][] API is deprecated.
+The [`util.isBoolean()`][] API is deprecated. Please use
+`typeof arg === 'boolean'` instead.
 
 ### DEP0046: `util.isBuffer()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1017,7 +1027,7 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
 The [`util.isBuffer()`][] API is deprecated. Please use
 [`Buffer.isBuffer()`][] instead.
@@ -1026,6 +1036,9 @@ The [`util.isBuffer()`][] API is deprecated. Please use
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1038,14 +1051,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isDate()`][] API is deprecated.
+The [`util.isDate()`][] API is deprecated. Please use
+`arg instanceof Date` instead.
 
 ### DEP0048: `util.isError()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1058,14 +1075,19 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isError()`][] API is deprecated.
+The [`util.isError()`][] API is deprecated. Please use
+`Object.prototype.toString(arg) === '[object Error]' || arg instanceof Error`
+instead.
 
 ### DEP0049: `util.isFunction()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1078,14 +1100,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isFunction()`][] API is deprecated.
+The [`util.isFunction()`][] API is deprecated. Please use
+`typeof arg === 'function'` instead.
 
 ### DEP0050: `util.isNull()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1098,14 +1124,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isNull()`][] API is deprecated.
+The [`util.isNull()`][] API is deprecated. Please use
+`arg === null` instead.
 
 ### DEP0051: `util.isNullOrUndefined()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1118,14 +1148,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isNullOrUndefined()`][] API is deprecated.
+The [`util.isNullOrUndefined()`][] API is deprecated. Please use
+`arg === null || arg === undefined` instead.
 
 ### DEP0052: `util.isNumber()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1138,14 +1172,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isNumber()`][] API is deprecated.
+The [`util.isNumber()`][] API is deprecated. Please use
+`typeof arg === 'number'` instead.
 
 ### DEP0053: `util.isObject()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1158,14 +1196,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isObject()`][] API is deprecated.
+The [`util.isObject()`][] API is deprecated. Please use
+`arg && typeof arg === 'object'` instead.
 
 ### DEP0054: `util.isPrimitive()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1178,14 +1220,19 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isPrimitive()`][] API is deprecated.
+The [`util.isPrimitive()`][] API is deprecated. Please use
+`arg === null || (typeof arg !=='object' && typeof arg !== 'function')`
+instead.
 
 ### DEP0055: `util.isRegExp()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1198,14 +1245,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isRegExp()`][] API is deprecated.
+The [`util.isRegExp()`][] API is deprecated. Please use
+`arg instanceof RegExp` instead.
 
 ### DEP0056: `util.isString()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1218,14 +1269,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isString()`][] API is deprecated.
+The [`util.isString()`][] API is deprecated. Please use
+`typeof arg === 'string'` instead.
 
 ### DEP0057: `util.isSymbol()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1238,14 +1293,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isSymbol()`][] API is deprecated.
+The [`util.isSymbol()`][] API is deprecated. Please use
+`typeof arg === 'symbol'` instead.
 
 ### DEP0058: `util.isUndefined()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -1258,14 +1317,18 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util.isUndefined()`][] API is deprecated.
+The [`util.isUndefined()`][] API is deprecated. Please use
+`arg === undefined` instead.
 
 ### DEP0059: `util.log()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version: v6.12.0
     pr-url: https://github.com/nodejs/node/pull/10116
     description: A deprecation code has been assigned.
@@ -1274,14 +1337,27 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
+
+The [`util.log()`][] API has been deprecated because it's an unmaintained
+legacy API that was exposed to user land by accident. Instead,
+consider the following alternatives based on your specific needs:
+
+* **Third-Party Logging Libraries**
+
+* **Use `console.log(new Date().toLocaleString(), message)`**
 
-The [`util.log()`][] API is deprecated.
+By adopting one of these alternatives, you can transition away from `util.log()`
+and choose a logging strategy that aligns with the specific
+requirements and complexity of your application.
 
 ### DEP0060: `util._extend()`
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version: v6.12.0
     pr-url: https://github.com/nodejs/node/pull/10116
     description: A deprecation code has been assigned.
@@ -1290,9 +1366,11 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
-The [`util._extend()`][] API is deprecated.
+The [`util._extend()`][] API is deprecated because it's an unmaintained
+legacy API that was exposed to user land by accident.
+Please use `target = Object.assign(target, source)` instead.
 
 ### DEP0061: `fs.SyncWriteStream`
 
diff --git a/lib/util.js b/lib/util.js
index 9ddb332f866355..b882ef304096a3 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -375,7 +375,9 @@ function _exceptionWithHostPort(...args) {
 module.exports = {
   _errnoException,
   _exceptionWithHostPort,
-  _extend,
+  _extend: deprecate(_extend,
+                     'The `util._extend` API is deprecated. Please use Object.assign() instead.',
+                     'DEP0060'),
   callbackify,
   debug: debuglog,
   debuglog,
@@ -386,9 +388,15 @@ module.exports = {
   getSystemErrorName,
   inherits,
   inspect,
-  isArray: ArrayIsArray,
-  isBoolean,
-  isBuffer,
+  isArray: deprecate(ArrayIsArray,
+                     'The `util.isArray` API is deprecated. Please use `Array.isArray()` instead.',
+                     'DEP0044'),
+  isBoolean: deprecate(isBoolean,
+                       'The `util.isBoolean` API is deprecated.  Please use `typeof arg === "boolean"` instead.',
+                       'DEP0045'),
+  isBuffer: deprecate(isBuffer,
+                      'The `util.isBuffer` API is deprecated. Please use `Buffer.isBuffer()` instead.',
+                      'DEP0046'),
   isDeepStrictEqual(a, b) {
     if (internalDeepEqual === undefined) {
       internalDeepEqual = require('internal/util/comparisons')
@@ -396,19 +404,52 @@ module.exports = {
     }
     return internalDeepEqual(a, b);
   },
-  isNull,
-  isNullOrUndefined,
-  isNumber,
-  isString,
-  isSymbol,
-  isUndefined,
-  isRegExp: types.isRegExp,
-  isObject,
-  isDate: types.isDate,
-  isError,
-  isFunction,
-  isPrimitive,
-  log,
+  isNull: deprecate(isNull,
+                    'The `util.isNull` API is deprecated. Please use `arg === null` instead.',
+                    'DEP0050'),
+  isNullOrUndefined: deprecate(isNullOrUndefined,
+                               'The `util.isNullOrUndefined` API is deprecated. ' +
+                               'Please use `arg === null || arg === undefined` instead.',
+                               'DEP0051'),
+  isNumber: deprecate(isNumber,
+                      'The `util.isNumber` API is deprecated. Please use `typeof arg === "number"` instead.',
+                      'DEP0052'),
+  isString: deprecate(isString,
+                      'The `util.isString` API is deprecated.  Please use `typeof arg === "string"` instead.',
+                      'DEP0056'),
+  isSymbol: deprecate(isSymbol,
+                      'The `util.isSymbol` API is deprecated.  Please use `arg === "symbol"` instead.',
+                      'DEP0057'),
+  isUndefined: deprecate(isUndefined,
+                         'The `util.isUndefined` API is deprecated. Please use `arg === undefined` instead.',
+                         'DEP0058'),
+  isRegExp: deprecate(types.isRegExp,
+                      'The `util.isRegExp` API is deprecated. Please use `arg instanceof RegExp` instead.',
+                      'DEP0055'),
+  isObject: deprecate(isObject,
+                      'The `util.isObject` API is deprecated. ' +
+                      'Please use `arg !== null && typeof arg === "object"` instead.',
+                      'DEP0053'),
+  isDate: deprecate(types.isDate,
+                    'The `util.isDate` API is deprecated.  Please use `arg instanceof Date` instead.',
+                    'DEP0047'),
+  isError: deprecate(isError,
+                     'The `util.isError` API is deprecated. ' +
+                     'Please use `ObjectPrototypeToString(e) === "[object Error]" ' +
+                     '|| e instanceof Error` instead.',
+                     'DEP0048'),
+  isFunction: deprecate(isFunction,
+                        'The `util.isFunction` API is deprecated.  Please use `typeof arg === "function"` instead.',
+                        'DEP0049'),
+  isPrimitive: deprecate(isPrimitive,
+                         'The `util.isPrimitive` API is deprecated. ' +
+                         'Please use `arg === null || ' +
+                         '(typeof arg !== "object" && typeof arg !== "function")` instead.',
+                         'DEP0054'),
+  log: deprecate(log,
+                 'The `util.log API is deprecated. ' +
+                 'Please use console.log() with a custom formatter or a third-party logger instead.',
+                 'DEP0059'),
   promisify,
   stripVTControlCharacters,
   toUSVString,