Strong's #1819: exapina (pronounced ex-ap'-ee-nah)
from 1537 and a derivative of the same as 160; of a sudden, i.e. unexpectedly:--suddenly. Compare 1810.
Thayer's Greek Lexicon:
̓́
exapina
1) suddenly
Part of Speech: adverb
Relation: from G1537 and a derivative of the same as G160
Usage:
This word is used 1 times:
Mark 9:8: "And suddenly, when they had looked round about, they saw no man any more, save Jesus"