sweet·en/`switṇ; ˈswiːtn/ v 1 [I,T] to make something sweeter or to become sweeter （使）变甜: Sweeten the mixture with honey. 加些蜂蜜使混合物变甜。 2 also 又作 sweeten sb up to do nice things for someone or give them presents, in order to persuade them to do something 讨好，笼络〔某人〕: They tried to sweeten him up with compliments before asking for more money. 他们试图用恭维话讨好他，然后再向他要更多的钱。