A noun appearing as G. bedhron “husband” in the Gnomish Lexicon of the 1910s replacing archaic G. †benn, a combination of the early root ᴱ√Beđ that was the basis for marriage words and the agental suffix G. -(r)on (GL/22).
Neo-Sindarin: I would adapt this into Neo-Sindarin as ᴺS. bethron “spouse (m.)”, a combination of the later root ᴹ√BES “wed” and the same agental suffix, where sr became thr.
A verb in the Gnomish Lexicon of the 1910s glossed “to tie” (GL/72), probably based on the early root ᴱ√SERE “twine, tie, bind” from the contemporaneous Qenya Lexicon, whose true form was probably ✱ᴱ√ÞERE (QL/83). In Tolkien’s later writings, √THER was “sew”; see that entry for details.