Antonyms of verb unseal

1 sense of unseal

Sense 1
unseal -- (break the seal of; "He unsealed the letter")
       Antonym of seal (Sense 2)
      => seal -- (close with or as if with a seal; "She sealed the letter with hot wax")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb unseal

1 sense of unseal

Sense 1
unseal -- (break the seal of; "He unsealed the letter")
       => open, open up -- (cause to open or to become open; "Mary opened the car door")