noun
A literary noun for deep, often quiet sadness or melancholy. Not an everyday conversational word; more common in written or poetic contexts.
彼の顔には深い憂愁の色が浮かんでいた。
A look of deep melancholy was on his face.
その詩は人生の憂愁を静かに歌っている。
The poem quietly sings of the sorrows of life.
Compound of 憂 (ゆう, 'sorrow, grief') and 愁 (しゅう, 'lament, melancholy'). The exact historical derivation is uncertain, but the combination has long been used in literary Chinese and Japanese to express a deep, often unspoken sadness.