めっきり

adverb, adverb taking the 'to' particle

remarkably; noticeably; considerably

Describes a clear, often sudden change in degree or state, especially a decline or increase that is easy to perceive. Commonly used with verbs like 減る, 増える, 寒くなる, 涼しくなる.

• 秋あきになると、めっきり涼すずしくなった。

  When autumn came, it became noticeably cooler.

• 最さい近