groggy
adj.
unsteady, off-balance; dazed, befuddled, drowsy; drunk (Archaic)
Sleep inertia
Sleep inertia is a physiological state characterised by a decline in motor
dexterity and a subjective feeling of grogginess, immediately following an abrupt
awakening from deep
sleep. Sleep inertia can also refer to the tendency of a person to want to return to sleeping, even after suitable rest has been achieved. Typically, sleep inertia lasts between 15 and 20 minutes for a night wake up and 5-10 minutes for a day wake up. If the subject is awakened due to a perceived danger, however, the duration of sleep inertia is reduced to only a few seconds.
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groggy
Adjective
1. stunned or confused and slow to react (as from blows or drunkenness or exhaustion)
(synonym) dazed, foggy, logy, stuporous
(similar) lethargic, unergetic
groggy
adj.
groggy, stunned
groggy
adj.
shocked; groggy, off-balance