Assured
来自Big Physics
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late Middle English: from Old French assurer, based on Latin ad- ‘to’ (expressing change) + securus (see secure).
etymonline
assured (adj.)
late 14c., of persons, "confident, self-assured," past-participle adjective from assure. From early 15c. as "secure, made safe." Related: Assuredly; assuredness.
