The state or quality of being groggy; a dazed, confused, or half-asleep condition.
From 'groggy' plus the noun-forming suffix '-ness,' creating an abstract noun describing the condition of grogginess.
Morning grogginess is sometimes called 'sleep inertia' by scientists—it's a real physiological state that makes even simple tasks confusing, and we named it after a nautical rum drink!
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