sign-off

The word "sign-off" is a modern English compound noun formed from the phrasal verb "to sign off." The core element "sign" originates from Latin signum, meaning a mark or token, which evolved to denote the act of writing one's name as a mark of authorization. The particle "off," of Germanic origin, conveys a sense of completion or cessation, as seen in its adverbial use. Combined, the literal sense is "to mark for completion," which logically developed into the formal act of giving final approval or concluding a communication. This evolution reflects the bureaucratic and procedural contexts where a signature formally ends or authorizes an action.

Structure: sign (to write/mark) + off (away/completion) - sign: From Latin signum (mark, token, sign). Functional role: The core semantic element, indicating the act of marking or endorsing. - off: From Old English of, off (away, from). Functional role: An adverbial particle indicating completion, conclusion, or separation.