Sleep

usgb/sliːp/Volume
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LampPro Tip 1/2
Essential NeedPlay
Sleep as a noun emphasizes its necessity, just like food or air. SlideHumans can't survive without sleep, it's essential.
LampPro Tip 2/2
Lack EffectsPlay
Mentioning a lack of sleep suggests negative consequences for health and mood. SlideHer lack of sleep made her irritable.