Home › Words › I › incertaintyincertaintyincertainty means uncertainty.EtymologyFrom Old French incertaineté.nounUncertainty.e.g.“all is naught, full of imposture, incertainty, and doth generally more harm then good.” — , II.4.1.iDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.uncertain 72% match — Not certain; unsure. vs incertainty →uncertainly 70% match — In an uncertain manner. vs incertainty →unsurety 68% match — Lack of surety; uncertainty; insecurity; doubt. vs incertainty →incertain 67% match — Not certain, uncertain. vs incertainty →unsure 66% match — uncertain, ambivalent. vs incertainty →doubtance 65% match — doubt; uncertainty vs incertainty →incertitude 64% match — uncertainty, doubt, insecurity vs incertainty →indeterminacy 63% match — The condition of being indeterminate. vs incertainty →