aggravate, reinforce, increase, strengthen, intensify　　這一組動詞都有加強的意思。　　aggravate v 加重，使之惡化。

　　I hurt my foot, then aggravated it by trying to walk too soon.我的腳受傷了而過早的下地走路又加重了傷情。

　　reinforce v.增援，一般用于軍隊或警察的行動;加固。

　　A police officer saw three thieves robbing a bank and radioed to reinforce him.一位警察看到三個盜賊搶劫銀行，用無線電話要求增援。

　　increase v.指數(shù)量上的增加。

　　The number of people has been increased.人數(shù)增加了。

　　strengthen v.加強，鞏固，增強，相當于to become stronger。

　　Exercising every day strengthens the heart.每天鍛煉可以提高心臟的功能。

　　Competition, they believe, strengthens the national character rather than corrupt it.人們認為競爭加強了民族性而不是破壞了它。

　　intensify v.使變得更強烈、劇烈，加劇，相當于to become more intense or intensive。

　　intensify colors加深色彩intensify hatred加深仇恨