An adjective appearing as ᴱN. asgatheb “bony” in Early Noldorin Word-lists of the 1920s, an elaboration of ᴱN. asg “bone” (PE13/160).

Neo-Sindarin: I would adapt this word as ᴺS. asgeb “bone” as an adjective form of ᴺS. asg “bone”.