un-, 不，非，requited,回报，报答。即不求回报的，引申词义单相思。

1. Wickedness does not go altogether unrequited.

[谚]恶有恶报.

来自《现代英汉综合大词典》

2. She fell in an unrequited love with the artist.

她单恋那位艺术家。

来自辞典例句

3. At any rate, my love for Rachel remained unrequited.

总之, 我对雷切尔的爱一直是单恋.

来自百科语句

4. You are Hilter's unrequited love!

你是希特勒单相思的情人.

来自辞典例句

5. The unrequited love festered in her mind.

单恋使她苦恼.

来自辞典例句