also: うでぢから
noun
physical strength; muscular power; arm strength
Refers to raw physical power, especially of the arms, but often used more broadly for bodily strength.
彼は腕力に自信がある。
He is confident in his physical strength.
腕力だけで問題を解決しようとしては
You shouldn't try to solve problems with brute force alone.
noun
Extended use: physical force or violence as a means of coercion, often contrasted with reason or negotiation.
議論で勝てないと、彼は腕力に訴える。
When he can't win an argument, he resorts to violence.