fix up section on Arabic plurals and gender

src/content/nouns/determiners.mdx

@@ -21,7 +21,10 @@ import nounWithAddons from "./noun-with-addons.excalidraw.svg";
 
 [Determiners](https://en.wikipedia.org/wiki/Determiner) are words that we can put in front of nous to express which nouns we are talking about. In Pashto we can use these words like these as determiners:
 
-- <InlinePs opts={opts} ps={{ p: "کوم", f: "koom", e: "which / some" }} />
+- <InlinePs
+ opts={opts}
+ ps={{ p: "کوم", f: "koom", e: "which / some / certain" }}
+ />
 - <InlinePs opts={opts} ps={{ p: "هر", f: "har", e: "every / each" }} />
 - <InlinePs opts={opts} ps={{ p: "ټول", f: "Tol", e: "all / the whole" }} />
 - <InlinePs opts={opts} ps={{ p: "هیڅ", f: "heets", e: "no / none" }} />
@@ -78,7 +81,7 @@ When used with questions, the word <InlinePs opts={opts} ps={{ p: "کوم", f: "
 
 ### With statements
 
-With statements, the word <InlinePs opts={opts} ps={{ p: "کوم", f: "koom" }} /> means "some."
+With statements, the word <InlinePs opts={opts} ps={{ p: "کوم", f: "koom" }} /> means "some" or "(a) certain."
 
 <Examples opts={opts}>
  {[
@@ -97,7 +100,7 @@ With statements, the word <InlinePs opts={opts} ps={{ p: "کوم", f: "koom" }}
  {
  p: "کوم کور ونړېد",
  f: "koom kor óonaRed",
- e: "Some home was destroyed",
+ e: "A certain home was destroyed",
  sub: "statement",
  },
  {

src/content/nouns/special-plurals.mdx

@@ -170,9 +170,9 @@ And some add an <InlinePs opts={opts} ps={{ p: "ین", f: "éen" }} /> on the en
  ]}
 </ArabicPluralTable>
 
-### Arabic Plurals are Always Masculine
+### Arabic Plurals are Often Masculine
 
-Once a word is put into it's special Arabic plural form, it's always a _masculine plural_ (based on the consonant ending) even if the singular version of the word was feminine.
+Once a word is put into it's special Arabic plural form, it often becomes a _masculine plural_ (based on the consonant ending) even if the singular version of the word was feminine. If the Arabic plural form ends in a feminine sounding ending, though, it still remains feminine.
 
 <ArabicPluralTable>
  {[
@@ -234,6 +234,22 @@ Once a word is put into it's special Arabic plural form, it's always a _masculin
  gender: "m",
  },
  ],
+ [
+ {
+ p: "منبع",
+ f: "manbá",
+ e: "source (f.)",
+ sub: "feminine",
+ gender: "f",
+ },
+ {
+ p: "منابع",
+ f: "manaabí",
+ e: "sources (f. pl.)",
+ sub: "feminine",
+ gender: "f",
+ },
+ ],
  ]}
 </ArabicPluralTable>