Applause

google

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late Middle English: from medieval Latin applausus, from the verb applaudere (see applaud).

wiktionary

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From Latin applausus, from applaudō(“I strike against, I applaud”) (whence applaud).

etymonline

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applause (n.)

early 15c., "commendation, praise," from Latin applausus, past participle of applaudere "approve by clapping hands" (see applaud). English in 16c.-17c. had applausible "worthy to be applauded."