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

gavos

noun. yield, crop, produce

A noun appearing as G. gavos “the yield, the crop, produce” in the Gnomish Lexicon of the 1910s based on the early root ᴱ√ı̯aƀa [YAɃA] (GL/38), since in Gnomish of the 1910s an initial y usually became g (HPG/§2.1).

Neo-Sindarin: The later iteration of this word was probably S. iavas “autumn” (LotR/1107). As this later meaning is significantly different, I would use ᴺS. iaust for “crop, ✱yield, produce” for purposes of Neo-Sindarin; see that entry for discussion.