彼は父の敵を討つために十年を費やした。

He spent ten years seeking to avenge his father.

彼女はまるで親の敵のように彼をにらみつけた。

She glared at him as if he had killed her parents.

敵を討つまでは故郷に帰らないと誓った。

He swore not to return home until he had taken his revenge.

兵士たちは夜通し敵の攻撃に備えた。

The soldiers stood ready all night for an enemy attack.

あの人を敵に回すと厄介なことになる。

Making an enemy of that man will cause you trouble.

今の彼の実力では、とても私の敵ではない。

With his current skill, he's no match for me.

睡眠不足は健康の敵だ。

Lack of sleep is the enemy of good health.

甘いお菓子はダイエットの敵です。

Sweets are the enemy of dieting.

湿気は楽器にとって最大の敵だ。

Humidity is the greatest enemy of musical instruments.

敵は今日も機嫌が悪いから、話しかけないほうがいいよ。

Our friend is in a bad mood again today, so you'd better not talk to him.

うちの敵ときたら、最近ゴルフに夢中で週末は全然家にいないのよ。

As for my other half, he's crazy about golf these days and is never home on weekends.

思い切って食事に誘ってみたら、敵もまんざらでもない様子だった。

When I worked up the nerve to ask her to dinner, the lady seemed not at all displeased.