Strong’s Greek
G674 — apopsucho
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀποψύχω
apopsucho — pronounced ap-ops-oo'-kho
from 575 and 5594; to breathe out, i.e. faint:--hearts failing. see GREEK for 575 see GREEK for 5594
1 occurrence in the KJV.
Luke 21:26
Men’s hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken.