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")

Antonyms of adj unsealed

2 senses of unsealed

Sense 1
unsealed (vs. sealed), uncertain -- (not established or confirmed; "his doom is as yet unsealed")

sealed (vs. unsealed), certain -- (established irrevocably; "his fate is sealed")

Sense 2
unsealed (vs. sealed) -- (not closed or secured with or as if with a seal; "unsealed goods"; "the letter arrived unsealed")

sealed (vs. unsealed) -- (closed or secured with or as if with a seal; "my lips are sealed"; "the package is still sealed"; "the premises are sealed")
        => unopened -- (not yet opened or unsealed; "unopened Christmas presents")

Similarity of adj unsealed

2 senses of unsealed

Sense 1
unsealed (vs. sealed), uncertain -- (not established or confirmed; "his doom is as yet unsealed")

Sense 2
unsealed (vs. sealed) -- (not closed or secured with or as if with a seal; "unsealed goods"; "the letter arrived unsealed")
       => open, opened -- (not sealed or having been unsealed; "the letter was already open"; "the opened package lay on the table")
          Also See-> open#2