IPA: //ˈsliːpɪli//
KK: /ˈsliːpɪli/
In a way that shows you are tired or ready to sleep.
She yawned sleepily as she got out of bed.
Sleepily → It is formed from "sleep" (from Old English *slæpan*, meaning to rest or be in a state of sleep) and "-ily" (a suffix forming adverbs, meaning in a manner of). The word "sleepily" means in a manner that is characteristic of being in a state of sleep or drowsiness.
Think of the word 'sleep' and remember that 'sleepily' describes doing something in a way that resembles being in a sleepy state.