Middle Primitive Elvish
ruk
root. pluck
ruk
root. demon
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.
ruk
root. pluck
ruk
root. demon
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 glossed “pluck” in the Quenya Verbal System (QVS) from 1948 serving as the basis for ᴹQ. ruk- of the same meaning (PE22/102), but mentioned nowhere else with this given meaning.