Strong's #1587: ekleipo (pronounced ek-li'-po)
from 1537 and 3007; to omit, i.e. (by implication) cease (die):--fail.
Thayer's Greek Lexicon:
̓́
ekleipō
1) fail
1a) to leave out, omit, pass by
1b) to leave, quit
2) to fail
2a) to leave off, cease, stop
2b) of the failing or eclipse of the light of the sun and the moon
Part of Speech: verb
Relation: from G1537 and G3007
Usage:
This word is used 3 times:
Luke 16:9: "of unrighteousness; that, when ye fail, they may receive you into everlasting"
Luke 22:32: "that thy faith fail not: and when thou"
Hebrews 1:12: "and thy years shall not fail."