寝ねぼけ声ごえ

noun

half-awake voice; sleepy voice

Describes the groggy, slurred, or mumbling voice of someone who has just woken up or is still drowsy.

• 朝あさ、寝ねぼけ声ごえで「おはよう」と言いった。

  In the morning, I said 'good morning' in a sleepy voice.

• 電でん話わに出でたら、まだ寝ねぼけ声ごえだった。

  When I answered the phone, my voice was still half-awake.