Qenya
lapsa-
verb. to lick (frequentative)
lapsa
noun. licking up (food or drink), gluttonous eating
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 Etymologies of the 1930s glossed “to lick (frequentative)” under the root ᴹ√LAB “lick” (Ety/LAB). Its derivation is not given, but it is probably from primitive ✱lab-ta, with the bt unvoicing to pt and then pt becoming to ps. This second sound change was abandoned by Tolkien in his later writings, so I’d avoid using this verb for purposes of Neo-Quenya, but you might use it if you assumed it was derived from ✱lab-sa. Alternately, you might use a different frequentative form like ✱laláva- or ✱lalappa-.