castrating, dampening, damping, deadening, dehydrating, desiccating, devitalizing, enervating, gelding, lobotomizing

burning out, debilitating, doing in, draining, enfeebling, exhausting, fatiguing, sapping, tuckering (out), undermining, weakening, wearing, wearing outdaunting, demoralizing, discouraging, disheartening, dispiriting

bracing, energizing, enlivening, invigorating, quickening, stimulating, vitalizing, vivifying

arousing, rousing, stirringcharging, electrifying, galvanizingexciting, fermenting, firing, fomenting, inciting, inflaming(also enflaming), instigating, kindling, provoking, sparking, triggering, whipping (up)abetting, boosting, buoying, cheering, emboldening, fortifying, heartening, inspiring, liftingreactivating, reanimating, reawakening, reawaking, recharging, reenergizing(or re-energizing), refreshing, regenerating, rejuvenating, rekindling, renewing, resurrecting, resuscitating, revitalizing, reviving