obliged
adj. <正式>感激，感谢；<正式>被迫做某事，必须做某事
v. （以法律、义务等）强迫，迫使；感激；（根据要求或需要）帮忙，效劳（oblige 的过去式和过去分词）
例句
I'm much obliged to you for helping us.
承蒙相助，本人不胜感激。
《牛津词典》
I'd be obliged if you would keep this to yourself.
如蒙保守这个秘密，我将感激不尽。
The President was obliged to concede power to the army.
总统被迫把权力让给军队。
