Qenya
lehta-
verb. to loose, slacken
(a)ranya
adjective. free
lenka-
verb. to loose, slacken
lepse
noun. finger
let
noun. finger
mirima
adjective. free
ranya
adjective. free
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 appearing as ᴹQ. lehta “loose, slacken” in The Etymologies of the 1930s under the root ᴹ√LEK “loose, let loose, release” (Ety/LEK). It had a variant form, given as leuka in The Etymologies as published in The Lost Road (LR/368), but in their Addenda and Corrigenda to the Etymologies Carl Hostetter and Patrick Wynne stated the actual form was lenka (VT45/27).