Early Quenya
karp-
verb. to pluck
karpi-
verb. to pluck
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 in the Early Qenya Grammar of the 1920s with present form karpe and past form karpie, derived from primitive ᴱ✶kṛp- “to pluck” (PE14/58), clearly related to the early root ᴱ√KᴬRPᴬR [KṚPṚ] from the Qenya Lexicon of the 1910s (QL/45). This verb appeared unglossed with various inflected forms in a document on Qenya Verb Forms, probably from the 1910s (PE14/34). A Qenya form karp- appeared in the Gnomish Lexicon of the 1910s, but it is unclear whether this was a verb or just a representation of Qenya derivatives of the root (GL/27).