• kayo, weary, curb, wear out, tucker, tranquilize, calm, dispirit, depress, enfeeble, dampen, inhibit, weaken, quench, exhaust, halt, sedate, sap, tire, suppress, deaden, restrain, daunt, stop, slow, wear, burn out, quell, dull, bore, tranquillise, jade, drain, repress, de-energize, harass, still, wash out, fag, damp, dissuade, undermine, dishearten, do in, tranquillize, stunt, enervate, fatigue, deactivate, demoralize, discourage, check, debilitate, de-energise.