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

uthra-

verb. to get away, escape

A verb appearing as G. uthra- “get away, escape” in the Gnomish Lexicon of the 1910s related to the noun G. uthwen “way out, exit; escape” (GL/75), both clearly based on the early root ᴱ√USU “get out, escape” (QL/98).

Neo-Sindarin: For purposes of Neo-Sindarin, I would adapt this verb as ᴺS. othra- “to get away, escape” with the usual Sindarin change of short u to o, based on a Neo-Root ᴺ√UTH.