unseal

UK: /ʌnˈsiːl/ US: /ʌnˈsil/ ,(un sēl′)

WordReference Random House Learner's Dictionary of American English © 2025

un•seal /ʌnˈsil/   v. [~ + object]

1. to break or remove the seal of;
   open.

WordReference Random House Unabridged Dictionary of American English © 2025

un•seal  (un sēl′), v.t. 

1. to break or remove the seal of;
   open, as something sealed or firmly closed:
   to unseal a letter; to unseal a tomb.
2. to free from constraint, as a person's thought, speech, or behavior:
   Their friendship unsealed her vivacity.

• 1375–1425; late Middle English unselen; see un-², seal¹

un•seal′a•ble, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

unseal / ʌnˈsiːl/ verb (transitive)

1. to remove or break the seal of
2. to reveal or free (something concealed or closed as if sealed): to unseal one's lips