Strong's #879: aphupnoo (pronounced af-oop-no'-o)
from a compound of 575 and 5258; properly, to become awake, i.e. (by implication) to drop (off) in slumber:--fall asleep.
Thayer's Greek Lexicon:
̓́
aphupnoō
1) to awaken from sleep
2) to fall asleep, to fall off to sleep
Part of Speech: verb
Relation: from a compound of G575 and G5258
Citing in TDNT: 8:545, 1233
Usage:
This word is used 1 times:
Luke 8:23: "But as they sailed he fell asleep: and there came down a storm of wind"