Usual
来自Big Physics
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late Middle English: from Old French, or from late Latin usualis, from Latin usus ‘a use’ (see use).
wiktionary
From Middle English usual, from Old French usuel, from Latin ūsuālis(“for use, fit for use, also of common use, customary, common, ordinary, usual”), from ūsus(“use, habit, custom”), from the past participle stem of ūtī(“to use”). Displaced native Old English ġewunelīċ.
etymonline
usual (adj.)
late 14c., from Old French usuel "current, in currency (of money), valid" (13c.) and directly from Late Latin usualis "ordinary," from Latin usus "custom" (see use (v.)). The usual suspects is from a line delivered by Claude Rains (as a French police inspector) in "Casablanca" (1942).
