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early 13c., from Old French pite, pitet "pity, mercy, compassion, care, tenderness; pitiful state, wretched condition" (11c., Modern French pitié), from Latin pietatem (nominative pietas) "piety, loyalty, duty" (see piety). Replaced Old English mildheortness, literally "mild-heartness," itself a loan-translation of Latin misericordia. English pity and piety were not fully distinguished until 17c. Transferred sense of "grounds or cause for pity" is from late 14c.
"to feel pity for," late 15c., from Old French pitier and from pity (n.). Related: Pitied; pitying.