Breakdown of kare wa bouryoku o tsukawanakatta.
Questions & Answers about kare wa bouryoku o tsukawanakatta.
を marks the direct object of the verb—the thing being used, eaten, seen, etc.
Here:
- 暴力 = violence
- を使う = to use something
So 暴力を使う literally means to use violence.
This is very standard Japanese grammar:
- 道具を使う = use a tool
- 日本語を使う = use Japanese
- 暴力を使う = use violence
