maかすkasu
1.

To bring an opponent to a state of defeat, resulting in their inability to win a competition or contest.

2.

To achieve victory over someone in a challenging situation, often implying a sense of overcoming or surpassing them.

3.

To cause someone to lose, effectively showcasing superiority in skill or strategy during a confrontation.

4.

To lead an adversary to experience defeat, emphasizing the act of winning against them in a competitive scenario.

Example:

あんなやつを負かすのはお茶の子さいさいだ。