Early Quenya
marda
noun. world
mard(a)-
verb. to grind, pulverize
talka marda
masculine name. Smith of the World
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. mard- “grind, pulverize” in the Qenya Lexicon of the 1910s under the early root ᴱ√MṚÐṚ (QL/63), where syllabic *ṛ* became *ar* as usual before a dental consonant (PE12/11). In a nearby comparison list of roots it was given as marda- “grind” (QL/63/11).