passed-out

The compound adjective 'passed-out' is a relatively modern formation, emerging from the phrasal verb 'to pass out'. The verb 'pass' originates from the Latin 'passus', meaning a step or pace, which evolved through Old French into the English sense of moving or proceeding. The particle 'out' is of ancient Germanic origin, signifying an external state. Literally, 'to pass out' meant to move out or proceed forth, but by the late 19th century, it developed the specific slang meaning of losing consciousness, likely from the concept of one's spirit or senses "going out." The participial adjective 'passed-out' subsequently formed to describe the resulting state. A secondary, formal meaning arose in military contexts, where completing training is conceptualized as "passing out" from the institution into active service.

Structure: passed (past participle of 'pass') + out (adverb/particle) - passed: From Middle English 'passen', from Old French 'passer', from Latin 'passus' (step, pace). In this compound, it functions as a verb in its past participle form, indicating a completed action. - out: From Old English 'ūt' (out, outside, forth), from Proto-Germanic ūt. In this compound, it functions as an adverbial particle, indicating a state of being external, beyond, or away from consciousness.