the word "treasonous" is built upon the noun "treason," which entered english from anglo-norman 'treisoun' and old french 'traïson'. these derive from latin 'traditio', a noun of action from 'tradere', meaning "to hand over, deliver, betray." this latin verb itself is a compound of 'trans-' (across) and 'dare' (to give). the suffix '-ous', of latin origin via french, is a prolific adjective-forming element. thus, the literal construction "treason + ous" yields the meaning "characterized by or full of betrayal," specifically the betrayal of one's allegiance or nation.

Structure: treason (betrayal) + ous (adjective suffix) - treason: from latin 'tradition-', 'traditio' meaning "a handing over, betrayal," from the verb 'tradere' (to hand over). functions as the core noun root. - ous: a suffix of latin origin via old french, forming adjectives meaning "full of, having the qualities of, characterized by."