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1707, present participle adjective from condescend. Originally in a positive sense (of God, the Savior, etc.) until late 18c. Related: Condescendingly (1650s).
mid-14c., "to yield deferentially," from Old French condescendere (14c.) "to agree, consent, give in, yield," from Late Latin condescendere "to let oneself down," from Latin com- "together" (see com-) + descendere "descend" (see descend). Sense of "to sink willingly to equal terms with inferiors" is from mid-15c.