Antonyms for invigorate

stimulate:

dissuade, enervate, halt, weaken, discourage, tire, depress, dull, bore, calm, kill, hurt, stop, dishearten, destroy, retard.

noun:

quell, stunt, inhibit, check, slow, quench, repress, wear, restrain, fag, jade, tucker, curb, undermine, damp, kayo, dull, suppress, sap, still.