Gnomish
artha-
verb. to approach
artha
preposition. alongside (of)
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.
artha-
verb. to approach
artha
preposition. alongside (of)
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 in the Gnomish Lexicon of the 1910s glossed “alongside (of)”, probably based on G. art “beside, along side of” (GL/20). It was followed by a cryptic comment “of motion to, c. all.”, which according probably indicates that when combined with the allative this word means “motion to[wards]”.