A verb in the Qenya Lexicon of the 1910s appearing as tildir “I cover” under the early root ᴱ√TḶDḶ (QL/93).
Early Quenya
tump-
verb. to cover
tump-
verb. to build; to beat
tildi-
verb. to cover
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 Qenya Lexicon of the 1910s glossed “build” under the early root ᴱ√TṂPṂ of the same meaning (QL/93). It reappeared in the Early Qenya Grammar of the 1920s with this same derivation but with the gloss “beat” (PE14/58).