Gnomish
hanna- Archaic
verb. to mow, cleave
antha-
verb. to give
hethos
noun. brother
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A word for “brother” in the Gnomish Lexicon of the 1910s, a masculinized form of G. heth “brother or sister, ✱sibling”, along with several (archaic?) variant forms {hethweg >>} hethwig, hestron, and hethron (GL/48-49). It was ultimately derived from the early root ᴱ√HESE [HEÞE?] (QL/40).