_fem. suff. _It corresponds to masc. -we. Q. -iel.
Sindarin
-iel
suffix. daughter; feminine suffix
-iel
suffix. adjective suffix
-iel
suffix. past-active-participle
-iel
suffix. It corresponds to masc
-il
suffix. feminine suffix
A fairly common feminine suffix appearing as -il in Sindarin, either formed on its own or as a variant of the feminine suffix -iel. This suffix was also common Noldorin words in The Etymologies of the 1930s, along with an alternate form -ril that seems to be a feminine agental suffix, the equivalent of masculine -(r)on, seen in pairs like N. melethril/melethron “lover” and N. odhril/odhron “parent” (Ety/MEL, ONO). The -il suffix and its -ril variant are seen all the way back in the Gnomish Lexicon of the 1910s in pairs like G. gwadhril/gwadhron “inhabitant” (GL/47) and G. ainil/ainos “god”, female and male respectively (GL/18). So it seems this feminine suffix was well established in Tolkien’s mind.
iell
daughter
- iell (-iel) (girl, maid), pl. ill, 2) sell (i hell) (girl, maid), pl. sill (i sill), coll. pl. sellath**. **DAUGTHER OF TWILIGHT, see NIGHTINGALE
iell
daughter
(-iel) (girl, maid), pl. ill
-eb
suffix. adjective suffix
-en
suffix. adjective suffix
-in
suffix. adjective suffix
-ren
suffix. adjective suffix
@@@ perhaps a later, S-only, innovation
sellath
noun. all the daughters
sell
daughter
(i** hell) (girl, maid), pl. sill (i** sill), coll. pl. *sellath***. **
A widely used feminine suffix in Sindarin (PE17/23, 190). It sometimes more specifically meant “-daughter” in names such as Elrenniel “Arwen; ✱(lit.) Elrond-daughter” (PE17/56) or Tinúviel “Daughter of Twilight” (S/165), but in other cases it simply meant female as in names like Gilthoniel “Star-kindler [female]” (PE17/23). It was also sometimes reduced to -il or -el. See the entry on the root √YE(L) for a discussion of various conceptual vacillations in its connection to “daughter”.
Conceptual Development: The use of N. -iel dates back to Noldorin, where its connection to “daughter” was more explicit, though Tolkien vacillated on whether the suffix was based on ᴹ√YEL or ᴹ√SEL (Ety/SEL, YEL). The suffix does not appear to be specifically feminine in Gnomish of the 1910s, however, appearing in both female names like G. Níniel (LT2/100) and male names like G. Inwithiel (LT1/22).