Strong’s Greek
G1819 — exapina
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἐξάπινα
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. see GREEK for 1537 see GREEK for 160 see GREEK for 1810
1 occurrence in the KJV.
Mark 9:8
And suddenly, when they had looked round about, they saw no man any more, save Jesus only with themselves.