Gnomish
tholos
noun. axle of a wheel
tholos
noun. sea-marge
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!
tholos
noun. axle of a wheel
tholos
noun. sea-marge
A word appearing as G. tholos “axle of a wheel” in the Gnomish Lexicon of the 1910s as a noun form of G. thol- “roll” (GL/73).
Neo-Sindarin: Since I retain ᴺS. thol- “to roll” for purposes of Neo-Sindarin, I would retain ᴺS. tholos “axle [of a wheel]” as well, from primitive ✱tholossē.