responsible/rɪˈspɔnsɪb(ə)l/
adj.1. (常与to, for连用)有责任的;应负责任的The bus driver is responsible for the passengers safety.公共汽车司机应对乘客的安全负责。
2. 负责任的;可靠的a responsible person为人负责的人
I am responsible for my sister until she gets a job.在我妹妹找到工作以前,我对她负责。
3. 责任重的a responsible position要职