sleepily
Word family
Synonym discussion
Sense: adverb/1
All three describe a state of low energy, but the cause differs. Drowsily suggests a gentle drift toward sleep — someone reading drowsily is gradually dozing off. Groggily adds disorientation; you wake groggily from deep sleep, not from a nap. Wearily is the broadest — it can cover emotional or physical exhaustion after a long day, not specifically the urge to sleep. For example: 'He drowsily turned the page' (falling asleep while reading); 'She groggily tried to find the alarm clock' (confused and just awake); 'They trudged wearily up the final hill' (tired but not necessarily sleepy).
Etymology
Formed from 'sleepy' (from Old English 'slǣpig', meaning 'inclined to sleep') plus the adverbial suffix '-ily'. The adjective 'sleepy' dates back to the early 1200s, and the adverb form 'sleepily' emerged in the mid-1500s.