v.加强；变坚固

He has been brought in to strengthen the defence. 已请他来加强后卫力量。

We will strengthen the protection of wet land. 我们将加强湿地保护。

Every effort was made to strengthen unity. 大家尽力加强团结。

The wind strengthened during the night. 风在夜间刮得更猛了。

strengthen的基本意思是使某物牢固,用于具体物质时,可指结构、强度的增强; 也可用于抽象事物,如权势、效力、影响、体制的增强; 用于人既可指体力、精力、抵抗力的增强,也可指勇气、意志、道德等的增强或提升。

strengthen既可用作及物动词,也可用作不及物动词。用作及物动词时,可接名词或代词作宾语。可用于被动结构。