morning coolness; morning chill (of a summer's day)
Archaic noun referring to the pleasant coolness of a summer morning. Cross-referenced with the shorter form 朝涼, which may be more common in modern contexts.
See also: 朝涼
Drawn by the morning coolness, I left my bed early.
Compound of 朝 (あさ, 'morning') and 涼み (すずみ, 'coolness'), the nominalized form of 涼む (すずむ, 'to cool oneself'). The exact historical derivation is uncertain, but the word follows a common pattern for seasonal nouns in classical Japanese.