きゅん

adverb, adverb taking the 'to' particle

with a squeeze in one's chest; heart-throbbing; choked up

Describes a sudden, tight feeling in the chest caused by strong emotion, such as love, sadness, or nostalgia. Often used in the phrase 胸がきゅんとなる.

• 彼かれの笑え顔がおを見みて胸むねがきゅんとなった。

  My heart squeezed when I saw his smile.

• 別わかれの場ば面めんで胸むねがきゅんとして涙なみだが出でた。

  I got choked up at the parting scene and tears came out.