Gnomish
pasta-
verb. to skin, peel, flay
cwas-
verb. to shake, wag, nod, flap
padhra-
verb. to skin, peel, flay
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.
The verb G. cwas- “wag, shake, flap (tr.)” appeared in the Gnomish Lexicon of the 1910s (GL/28), clearly based on the early root ᴱ√QASA and cognate to ᴱQ. qasa- “shake, flap, nod, rustle” (QL/76). On another page in GL Tolkien had G. cwas- or cwath- glossed “shake, nod, wag. tr. & intr.”, and another verb G. cwathra- “shake (intr.)” (GL/28).
Neo-Sindarin: Since I retain ᴺQ. quas- “shake” for purposes of Neo-Quenya, I would adapt the above verbs for purposes of Neo-Sindarin as well. Fiona Jallings suggested ᴺS. pasta- in a 2021-03-04 conversation on the Vinyë Lambengolmor Discord Server (VLDS) with the usual Sindarin sound change of ancient kw to p, and I’ve adopted this verb form for the meanings “to shake, wag, nod, flap” as an updated version of G. cwas-.