stimulant

n. 兴奋剂，刺激物

stiffness, stifle, stifling, stiflingly, stigma, stigmata, stigmatize, stigmatize, stigmatise, stile, stiletto, stiletto heel, still, still birth, still life, stillborn, stillness, stilt, stilted, stiltedly, Stilton, stimulate, stimulated, stimulating, stimulation, stimulus, sting, sting-ray, stinger, stingily, stinginess, stinging-nettle, stingy, stink, stink-bomb, stinker, stinking, stint, stipend, stipendiary, stipple,