(v. t.) To blunt; to turn, as an edge; figuratively, to cause to be obtuse or dull; as, to retund confidence.

abate ablate abrade abstract alleviate allow attenuate bar be eaten away blunt charge off close consume consume away corrode count out crumble curtail cut debar decline decrease deduct deliquesce depreciate derogate detract die away die down dilute diminish discount disedge disparage dive drain draw the teeth drop drop off dull dwindle ease ease off ease up eat away ebb eliminate erode except extenuate extract fall fall away fall off file away impair kick back languish leach lessen let down let up loose loosen make allowance melt away mitigate moderate obtund plummet plunge purify rebate reduce refine refund relax remit remove repress retrench retund rub away rule out run low sag shorten shrink sink slack slack off slack up slacken slake subduct subside subtract suspend tail off take a premium take away take from take off taper taper off thin thin out turn unbend unbrace unstrain unstring wane waste waste away water down weaken wear wear away weed withdraw write off