Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Gnomish

ruf-

verb. to tear

A verb appearing as G. ruf- “tear” in the Gnomish Lexicon of the 1910s (GL/66), perhaps based on the early root ᴱ√RUVU “burst asunder” (QL/81).

Neo-Sindarin: Since I retain this early root as ᴺ√RUB, I would retain and update this early word as ᴺS. rov- “to tear” to better fit Sindarin phonology.