A word appearing as G. mabwedri “dexterity” in the Gnomish Lexicon of the 1910s, an abstract noun form of G. mabwed “dextrous” (GL/55).
Neo-Sindarin: For purposes of Neo-Sindarin, I would adapted this word as ᴺS. mabrenas “dexterity” as an abstract noun form of S. mabren “dextrous”.
A word appearing as G. mabwed “handed, having hands. dexterous” in the Gnomish Lexicon of the 1910s, an adjectival form of G. mab “hand(s)” (GL/55). It also appeared with a vocalic augment: G. amabwed “having hands” (GL/19). This augmented form amabwed reappeared in the Gnomish Lexicon Slips modifying that document (PE13/109).
Neo-Sindarin: For purposes of Neo-Sindarin, I would adapted this word as ᴺS. mabren using a later adjectival suffix: -ren.