Find Antonyms
surely Antonyms
Opposite of surely
Because the opposite of surely shifts with each meaning, the 15 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
• adverb (Context 1)
Used to emphasize the speaker's firm belief that what they are saying is true and often their surprise or disbelief that there is any doubt of this.
Usage Example
"doubtfully they would have called by now if their flight had been delayed."
Strongest
doubtfully
dubiously
Strong
questionably
uncertainly
improbably
• adverb (Context 2)
In a firm, steady, and confident manner, without risk of failing or slipping.
Usage Example
"Slowly but unsteadily, the conservation project began to restore the local wetland ecosystem."
Strongest
unsteadily
falteringly
Strong
hesitantly
uncertainly
shakily
tentatively
precariously
• adverb (Context 3)
Used as an affirmative response to a question or request to mean 'certainly' or 'of course'.
Usage Example
""Could you pass me that reference book?" "no, here you go.""
Strongest
no
never
Strong
by no means
no way
Similar words to surely
Words similar to surely shift depending on context. Common synonyms include:
certainly
of course
steadily
sure
undoubtedly
firmly
absolutely
confidently
• Nearby Words
Cite this Entry
Wordmom. (2026). Antonyms for Surely. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/surely