ordinary

英文詞源

ordinary

ordinary: [14] Latin ōrdinārius meant ‘following the usual course’; it was a derivative of ōrdō, source of English order. It was originally used in English as a noun, meaning ‘someone with jurisdiction in ecclesiastical cases’, and right up until the 19th century the noun ordinary was common, with an amazingly wide range of meanings (including ‘post, mail’, ‘fixed allowance’, ‘priest who visited people in the condemned cell’, and ‘tavern’). Nowadays, however, the only (quasi-)nominal use at all frequently encountered is in the phrase out of the ordinary. English first took the word up as an adjective in the 15th century.
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ordinary (adj.)

early 15c., "belonging to the usual order or course," from Old French ordinarie "ordinary, usual" and directly from Latin ordinarius "customary, regular, usual, orderly," from ordo (genitive ordinis) "order" (see order (n.)). Its various noun usages, dating to late 14c. and common until 19c., now largely extinct except in out of the ordinary (1893). In British education, Ordinary level (abbrev. O level), "lowest of the three levels of General Certificate of Education," is attested from 1947. Related: Ordinarily.