A word in the Qenya Lexicon of the 1910s glossed “related by marriage”, an adjectival elaboration of ᴱQ. vesta- “to marry” (QL/101).
Early Quenya
vesta
noun. state of marriage
vestani
noun. *bride
vestanoina
adjective. related by marriage
vesta-
verb. to wed, marry, join others in marriage; (refl.) to get married
vestale
noun. wedding
vestaner
noun. ?(bride)groom
vestaqin
noun. ?bride
(a)kainu-
verb. to wed
A verb for “to wed” in the Qenya Lexicon of the 1910s with variants kainu- and akainu- under the early root ᴱ√KAYA “lie, rest; dwell”, so perhaps originally meaning “✱to come to lie together”, but Tolkien marked the entire entry with a “?” (QL/46).
kainu-
verb. to wed
An unglossed word in the Qenya Lexicon of the 1910s with variants vestani and vestaqin (QL/101), combinations of ᴱQ. vesta “marriage” with feminine suffixes ᴱQ. -ni or ᴱQ. qin “woman”, so perhaps “✱marriage woman” = “✱bride”.