Someone who is accountable is completely responsible for what they do and must be able to give a satisfactory reason for it.

accountable to She is accountable only to the managing director. 她只对总裁负责。

Politicians should be accountable to the public who elected them. 政界人士应对他们的选民负责。

accountable for The recent tax reforms have made government more accountable for its spending. 最近的税务改革使政府的开支更加透明化。

hold someone accountable for something You have to hold your employees accountable for their actions, or else they will just do whatever they please.