Early Quenya
vesta
noun. state of marriage
vesta-
verb. to wed, marry, join others in marriage; (refl.) to get married
(a)kainu-
verb. to wed
kainu-
verb. to wed
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
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).