Early Primitive Elvish
ete
root. cling together
ese
root. out
eðe
root. out
eře
root. out
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 root in the Qenya Lexicon of the 1910s glossed “cling together” serving as the basis for words for “ivy” and “cousin” (QL/36). It was probably replaced by √ET “out”.
Neo-Eldarin: For purposes of Neo-Eldarin, the “ivy” words might be salvageable as derivatives of √ET in the sense of “a thing clinging to the outside”.