also: ねつきのよい
expression, i-adjective (yoi/ii class)
falling asleep easily; finding it easy to fall asleep
Describes a person who has little trouble falling asleep, or a condition that promotes quick sleep onset.
彼は寝つきのいい体質で、布団に入るとすぐに眠れる。
He has a constitution that makes it easy to fall asleep; he can sleep as soon as he gets into bed.
寝つきのいい音楽を聴くと、リラックスして眠りにつける。
Listening to music that helps you fall asleep easily lets you relax and drift off.
Search-only form; a less common variant using よい.
Compound of 寝つき (falling asleep, from 寝る 'to sleep' + つく 'to settle') + の (attributive particle) + いい (good).