reassure
v[Tn, Tn.pr, Dn.f]
~ sb (about sth) remove sb´s fears or doubts; make sb confident again 消除某人的恐惧或疑虑; 恢复某人的信心; 使某人放心
The police reassured her about her child´s safety. 警方让她放心, 她的孩子很安全.
A glance in the mirror reassured him that his tie wasn´t crooked. 他照了一下镜子, 领带确实没有戴歪.