A verb appearing as G. tubla- “hide (intr.)” in the Gnomish Lexicon of the 1910s, apparently based on G. tub- “cover” (GL/71) from the early root ᴱ√TUPU (QL/95).

Neo-Sindarin: Since √TUP “cover, hide” survives in Tolkien’s later writings, I would retain and adapt this Gnomish verb as ᴺS. tobla- “hide”, but would use it both transitively and intransitively.