Also see definition of "Mar" in Word Study
Mar
MAR [isbe]
MAR - mar: "To mar" means "to destroy," "to disfigure," "to damage." Job 30:13, "They mar my path" (the Revised Version margin "they break up"); Nah 2:2, "and destroyed their vine" (the King James Version "and marred their vine"); compare Lev 19:27; 2 Ki 3:19; Isa 52:14; Jer 13:9.
Also see definition of "Mar" in Word Study