Gnomish
gama-
verb. to call, shout to
gam(m)a-
noun/verb. gain, profit, interest (on moneys), increase; to be profitable, bring in revenue; to gain
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!
A word appearing as G. {gamba- >>} gama- or gamma- in the Gnomish Lexicon of the 1910s, appearing twice with two different translations: “gain, profit, interest (on moneys), increase” and “to be profitable, bring in revenue; (tr.) to gain” (GL/37). The first set of glosses may be as a noun, despite the “-” at the end of the word form. These words may be related to the early root ᴱ√yṇt from which the adverb G. gantha “more” was derived.
Neo-Sindarin: I would adapt this as a verb ᴺS. ganna- “gain; be profitable, bring in revenue” based on the Neo-Root ᴺ√GYANTA having to do with increase.