onerous

厄介な仕事

describes a piece of work that is very demanding or tedious

難しくて不快な仕事

describes a heavy and difficult load or responsibility

重い責任

describes the state of being accountable for something very difficult

非常に困難な事柄に対して責任を負う状態を表す

厄介な義務

describes a moral or legal obligation that is very difficult to perform

遂行が非常に困難な道徳的または法的義務を表す