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

mugli

noun. calf

A word appearing as G. mugli “calf” in the Gnomish Lexicon of the 1910s, apparently some kind of diminutive form of G. “ox” (GL/58).

Neo-Sindarin: For Neo-Sindarin I would adapt this word as ᴺS. munneg, a diminutive of later S. mund “bull”.