ᴺQ. [ᴱQ.] ressë n. “female cousin, kinsman, *relative” (Category: Cousin)
A noun appearing as ᴱQ. resse “kinswoman, cousin” in the Qenya Lexicon of the 1910s, under the early root ᴱ√RESE “aid, support ?” (QL/79); the question mark was Tolkien’s. Tolkien later added a note to this entry clarifying that the “kin, cousin” words were derived from primitive reðe; see the entry on ᴱ√REÐE for further discussion.
Neo-Quenya: I would adapt this word as ᴺQ. ressë “female cousin, kinsman or relative” from a Neo-Root ᴺ√RE(N)D. The primitive form *red-se would become retsë in Quenya, but I would assume this word was altered to ressë by analogy with other feminine forms like nissë “woman”.
References ✧ QL/79
|ᴱ√RESE > resse||[ressē] > [resse]||✧ QL/79|
|ᴱ√reðe > resse||[reðsē] > [reðse] > [rezse] > [resse]||✧ QL/79|