strengthen/'streŋθən/

v. (make sth) become stronger

v. [I; T] 加强，增强；加固：Our friendship has strengthened over the years. 过去的几年里，我们的友谊增进了。

◇The new leader tried to strengthen his position. 新领导试图加强他的地位。

◇strengthen a bridge 对桥进行加固

构词strength + -en