Early Quenya
sink
noun. mineral, gem, metal
núta-
verb. to stoop, sink
lipte-
verb. to drip
lunga(na)-
verb. to sag, bend (down), hang heavy, lean
tub-
verb. to dive
tum-
verb. to dive
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 ᴱQ. lipte- “to drip” in the Qenya Lexicon of the 1910s under the early root ᴱ√LIPI (QL/54).
Neo-Quenya: The verb form lipte- is abnormal, so I would adapt this as ᴺQ. lipta- (pronounced [liɸta]) “to drip” for purposes of Neo-Quenya, reconceived of as a derivative of the later root ᴹ√LIB “drip”.