uncertain

English · Thesaurus

AI In plain words

Writing a short explanation…

Written by a house AI from the entry below, in your language. The entry itself is the source.

uncertain

  • /ʌnˈsɜːtən/ UK
  • /ʌnˈsɜɹ.tən/ US

Rhymes with -ɜː(ɹ)tən

Where it comes from

From Middle English uncerteyn. By surface analysis, un- + certain.

adjective more uncertain · uncertainer · most uncertain · uncertainest

  1. Not certain; unsure. Conſider man without the protection and conduct of a ſuperior Being, and he is ſecure of nothing that he enjoys in this world, and uncertain of every thing that he hopes for.

    Similar: unascertained, shaky

  2. Not known for certain; questionable. Tomorrow's weather is uncertain.
  3. Not yet determined; undecided.

    Similar: unascertained

  4. Variable and subject to change.
  5. Fitful or unsteady. Turning back, then, toward the basement staircase, she began to grope her way through blinding darkness, but had taken only a few uncertain steps when, of a sudden, she stopped short and for a little stood like a stricken thing, quite motionless save that she quaked to her very marrow in the grasp o
  6. Unpredictable or capricious. O, woman! in our hours of ease, / Uncertain, coy, and hard to please, / And variable as the shade / By the light quivering aspen made; […]

Opposite: certain

noun

  1. uncountable, with definite article Something uncertain; everything uncertain. Near-synonyms: uncertainty (countable sense), uncertainties

    Similar: uncertainty, uncertainties

Thesaurus

Closest in meaning: incertain, unsure, iffy, doubtful, dubious, ambiguous, unsafe, ambivalent, hesitant, chancy, insecure, undependable, unreliable, indefinite, unsettled, unsealed

adjective

Opposite: certain

Translations

Every language

adj not known for certain; questionable

Españolincierto, poco certero
हिन्दीअनिश्चित aniścit
Portuguêsincerto
Françaisincertain
Deutschungewiss, unsicher
Ελληνικάαβέβαιος avévaios
Românănesigur, incert
Русскийнеопределённый neopredeljónnyj, нея́сный nejásnyj, неуве́ренный neuvérennyj

adj not yet determined; undecided

Españolincierto
हिन्दीअनिश्चित aniścit
Portuguêsincerto, indeterminado
Françaisincertain
Deutschunbestimmt
Românănedecis, indecis
Русскийнеопределённый neopredeljónnyj

adj variable and subject to change

Españolincierto
Portuguêsincerto
Françaisincertain
Deutschunbeständig, unsicher
Românăinstabil, inconstant, nestatornic, nestabil

adj fitful or unsteady

Deutschunbeständig
Românăinstabil, neregulat, variabil
Русскийнеусто́йчивый neustójčivyj, нестаби́льный nestabílʹnyj, изме́нчивый izménčivyj, непостоя́нный nepostojánnyj

adj unpredictable or capricious

हिन्दीअनिश्चित aniścit
Deutschunbeständig
Românăimprevizibil
Русскийнепредсказу́емый nepredskazújemyj

Talk about this word

Cite this
MLA

"uncertain." Wiktionary, via Micwyn, micwyn.com/word/uncertain. Accessed 6 Nov. 2026.

APA

uncertain. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/uncertain

Chicago

"uncertain." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/uncertain.

BibTeX
@misc{uncertain_2026,
  title = {uncertain},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/uncertain},
  urldate = {2026-11-06}
}