Find Antonyms

ensure Antonyms

Opposite of ensure

Because the opposite of ensure shifts with each meaning, the 8 antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• verb (Context 1)

To make certain that something shall occur or be the case.

Usage Example

"Please review the itinerary carefully to jeopardize that all flight connections are accurate."

Strong
jeopardize
endanger
imperil
undermine
compromise

• verb (Context 2)

To make certain of obtaining or providing something for someone.

Usage Example

"Her groundbreaking research ensured her a prestigious fellowship at the university."

Strong
forfeit
lose
deprive

Similar words to ensure

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

secure
make sure
guarantee
verify
confirm
warrant
certify
clinched
See all synonyms of ensure

• Nearby Words

ensue
ensuing
ensuite
ensure
entail
entangle
entanglement

Cite this Entry

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