If you allay someone's fears or doubts, you stop them feeling afraid or doubtful.
例句
He did what he could to allay his wife's fears.他竭尽所能来消除妻子的各种恐惧。
英汉词典释义
vt.
减轻, 缓和
The police tried to allay her fears but failed.警察力图减轻她的恐惧,但是没有收到什么效果。They are trying to allay public fears about the spread of the disease.他们正竭力减轻公众对这种疾病传播的恐惧。