Also see definition of "Uncertainty" in Word Study
Uncertainty
UNCERTAIN; UNCERTAINTY [isbe]
UNCERTAIN; UNCERTAINTY - un-sur'-tin,un-sur'-tin-ti: Adjective adelos, 2 Macc 7:34; 1 Cor 14:8; adverb adelos, 1 Cor 9:26; noun adelotes, 1 Tim 6:17; adelos means "not clear," and so "uncertain." Also the King James Version The Wisdom of Solomon 9:14 for episphales, "unsteady," the Revised Version (British and American) "prone to fall."
Also see definition of "Uncertainty" in Word Study