constringe

寒冷的天气会使血管收缩，从而减少热量散失。

Cold weather can ___constringe the blood vessels, reducing heat loss.

这种药物能有效收缩毛孔，让皮肤看起来更细腻。

This medication can effectively ___constringe the pores, making the skin look finer.

恐惧会令喉咙的肌肉收缩，导致声音变得沙哑。

Fear may ___constringe the throat muscles, causing the voice to become hoarse.