If you feel obligated to do something, you feel that it is your duty to do it. If you are obligated to someone, you feel that it is your duty to look after them.
例句
I felt obligated to let him read the letter...我觉得有义务让他看到这封信。He had got a girl pregnant and felt obligated to her and the child.他搞大了一个女孩的肚子,觉得自己有责任照顾母子俩。
英英词典释义
Adjective
1. caused by law or conscience to follow a certain course;
"felt obligated to repay the kindness""was obligated to pay off the student loan"