Gnomish
gant
adjective. larger, greater, more, (lit.) increased
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!
The Gnomish Lexicon of the 1910s had G. gant “larger, greater, more” or more literally “increased”, along with related adverb G. gantha “more”, both derived from the early root ᴱ√yṇt (GL/37). These were the basis for the early superlative suffixes -iant(ha) or -iont(ha), and were the opposite of diminutive inthi “less” (GL/51).
Neo-Sindarin: I would retain ᴺS. gant “larger, greater, more, (lit.) increased” for purposes of Neo-Sindarin, based on the Neo-Root ᴺ√GYANTA.