mercify🔊verbEtymology From mercy + -fy.1Obsolete, Rare To have mercy on; to pity.Whilest she did weepe, of no man mercifide […]1596, Edmund Spenser, “Book VI, Canto VII”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, →OCLC: