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seal Antonyms
Opposite of seal
Looking for antonyms for seal? Sourced from our comprehensive thesaurus, here is a list of opposite words and the exact opposite of seal, organized by relevance and context.
• verb (Context 1)
To close or fasten tightly to prevent anything from passing in or out.
Usage Example
"She carefully sealed the envelope before dropping it into the mail slot."
Strongest
unseal
open
• verb (Context 2)
To guarantee, secure, or finalize an agreement or decision irrevocably.
Usage Example
"The two executives shook hands to cancel the lucrative business deal."
Strong
cancel
nullify
• verb (Context 3)
To coat a surface with a protective substance to prevent moisture or dirt from penetrating.
Usage Example
"You should strip the wooden deck before winter to protect it from the snow and rain."
Weak
strip
Similar words to seal
Looking for synonyms? Words similar to seal vary depending on the context. Here are a few common synonyms:
finalize
signet
gasket
shut
conclude
stamp
waterproof
close
Cite this Entry
Wordmom. (2026). Antonyms for Seal. In Wordmom Thesaurus. Retrieved Oct 14, 2026, from https://wordmom.com/antonyms/seal