Early Quenya
mald-
verb. to pound, crush
mild(i)-
verb. to pound
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.
This verb appeared in the Qenya Lexicon of the 1910s with variants ᴱQ. mald- and mild-, both meaning “pound” and derived from the early root ᴱ√MLŘL [MḶÐḶ] (QL/62). Elsewhere in the document Tolkien said the verb mildi- meant “crush, pound” (QL/63).
Neo-Quenya: I would retain this verb as ᴺQ. malda- “to pound”, but update its derivation to be from the later root ᴹ√MBAL (Ety/MBAL).