Find Antonyms

probably Antonyms

Opposite of probably

Pinning down the opposite of probably requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adverb definition and ranked by contrast strength.
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• adverb (Context 1)

Almost certainly; as far as one knows or can tell; in all likelihood.

Usage Example

"Given the dark clouds gathering on the horizon, it will improbably rain before evening."

Strongest
improbably
unlikely
Strong
doubtfully
implausibly
questionably

Similar words to probably

Words similar to probably shift depending on context. Common synonyms include:

likely
presumably
doubtless
undoubtedly
doubtlessly
believably
plausibly
See all synonyms of probably

• Nearby Words

proactivity
probability
probable
probably
probate
probation
probational

Cite this Entry

Wordmom. (2026). Antonyms for Probably. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/probably
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