1) iell (-iel) (daughter, maid), pl. ill; 2) sell (i hell) (daughter, maid), pl. sill (i sill), coll. pl. sellath. 3) (girl in her teens, approaching the adult) neth (also used = ”sister”), pl. nith (VT47:14-16, 33; VT48:6). Notice the homophone neth ”young”. The final element -wen in names means ”girl, maiden, virgin”.
Quenya
nettë
girl, daughter
nettë (stem *netti-, given the primitive form listed in VT47:17) noun "girl, daughter" (but also "sister", see below), also used as a play-name of the "fourth finger" or "fourth toe" (VT47:10, VT48:6), in two-hand play also used for the numeral "nine" (nettë is conceived as being related to nertë, q.v.) Nettë is also defined as "sister" or "girl approaching the adult" (VT47:16, VT49:25), "girl/daughter" (VT47:15-16); it may be that "sister" was Tolkien's final decision on the meaning (VT48:4, 22) - The related word nésa seems like a less ambiguous translation of "sister".