す済suませるmaseru
1.
To bring something to a conclusion or to complete a task, often implying a sense of finality or resolution.
2.
To facilitate the resolution of a matter or to help someone move past an obligation or responsibility.
3.
To take care of, handle, or settle a situation, ensuring that it comes to a satisfactory close.
4.
To manage an affair or responsibility in such a way that it is no longer pending or incomplete.
Example:
私は宿題をすませてからテレビを見た。