Gnomish
ress
noun. cousin (f.), relative
goredhnir
noun. cousin (f.)
goredhwin
noun. cousin (f.)
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
ress
noun. cousin (f.), relative
goredhnir
noun. cousin (f.)
goredhwin
noun. cousin (f.)
G. ress appeared in the Gnomish Lexicon of the 1910s as a word for a female cousin or relative based on the early root ᴱ√redh- (GL/65). It had poetic equivalents G. redhwin and redhir, which also appeared in the more elaborate forms G. goredhwin or goredhnir (GL/41). Two more variants, G. hethres and G. gedres (with deleted variant {gedhris}), referred to first and second female cousins respectively, with the prefixes G. heth (for close relation) and G. ged (a more distant relation) respectively (GL/38; GL/48).
Neo-Sindarin: I would retain ᴺS. ress as a Neo-Sindarin word for “female cousin or relative” as a derivative of the Neo-Root ᴺ√RE(N)D, but would abandon all the more elaborate variants. This form cannot be a direct result of ancient ✱red+se, so I think the ss is the result of analogy from other feminine forms like S. bess “wife”.