ثَلَمَ: فَلّ، سَنّنَ، خَدّدَ to blunt, notch, (in) dent, jag, tooth; to groove, furrow, rut

ثَلَمَ الصّيتَ أو السّمْعَةَ to defile, sully, dishonor, disgrace, discredit, tarnish, (be) smirch, soil, blacken; to defame, slander, calumniate, backbite