This is the 5930th most frequent Japanese word.
やっつけ
"やっつけ" means to do something hastily, carelessly, or to finish off in a rushed manner.
In this sentence, 'やっつける' is used to imply completing a task quickly, often without much attention to detail or enthusiasm.
彼は宿題をやっつけた。
He finished his homework swiftly.
Here, 'やっつける' indicates overcoming or defeating in a combat or challenge situation.
敵をやっつける。
To defeat the enemy.
This usage shows the meaning of handling a task promptly, usually with the intent of resolving it and moving on.