opiate

OPIATE = OPI (OPIUM) + ATE (TO EAT). Therefore, as you ATE the medicine with OPIUM in it, you are feeling drowsy (sleepy).

o+pi+ate = kha pi ke bahut neend aati hai

Pia sounds like Piya(drink) in hindi..kya piya?? Davai piya...i.e Medicine that makes u sleep..

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Over PIA(drank) + ATE(eat)...so guess what happens next...!!!

operate surgery will give medicine to deadpain and deep sleep