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validate (v.)
1640s, from Medieval Latin validatus, past participle of validare "to make valid," from validus (see valid). Related: Validated; validating.
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validation (n.)
"act of giving validity," 1650s, noun of action from validate.
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ratify (v.)

mid-14c., ratifien, "confirm, approve, sanction, validate by formal act of approval," from Old French ratifier (13c.), from Medieval Latin ratificare "confirm, approve," literally "fix by reckoning," from Latin ratus "fixed by calculation; determined; approved; certain, sure; valid" (past-participle adjective from reri "to reckon, think;" from PIE root *re- "to reason, count") + combining form of facere "to make" (from PIE root *dhe- "to set, put"). Related: Ratified; ratifying.

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