I'll engagefor John's behaviour should you decide to employ him.
如果你决定聘用约翰，我愿为他的行为担保。
《新英汉大辞典》
2
I'm sorry. It is more than I can engagefor.
我很抱歉，这事超出了我的担保范围。
3
A gamification strategy that is not sufficiently thought through or well tailored to its players may engage people for a little while, but it will not motivate people in the long term.