Respond

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late Middle English (as a noun): from Old French, from respondre ‘to answer’, from Latin respondere, from re- ‘again’ + spondere ‘to pledge’. The verb dates from the mid 16th century.

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From Middle English respounden, from Old French respondre (Modern répondre), from Latin respondeō.

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respond (v.)

"make answer, give a reply in words," c. 1300, respounden, from Anglo-French respundre, Old French respondere "respond, correspond" and directly from Latin respondere "respond, answer to, promise in return," from re- "back" (see re-) + spondere "to pledge" (see sponsor (n.)). Modern spelling and pronunciation is from c. 1600. From 17c. also "make a liturgical response." Related: Responded; responding.