obliged adj.
1 forced to do sth
VERBS be, feel
ADV. virtually Libel plaintiffs are virtually obliged to go into the witness box. | by law, contractually, legally Parents are obliged by law to send their children to school. | morally I felt morally obliged to do the best I could for her.
2 grateful
VERBS be, feel
ADV. much
PREP. for, to I'm much obliged to you for helping us.
You can also check other dicts: obliged (English, 中文解释 ), wordnet sense, Collins Definition