つとtsutoまるmaruつとtsutoまるmaru
1.

To be capable of fulfilling a designated role or responsibility effectively, such as in a leadership position.

2.

To possess the necessary qualities or skills to adequately perform a specific task or function.

3.

To succeed in meeting the expectations associated with a particular duty or assignment.

Example:

その救助投手でエースの代わりはとても務まらなかった。