To give access to; open.
Free means to release or let go.
To open to a slight extent:
To become free from prejudice, etc.; become liberal and generous
To close or fasten with a seal:
Find another word for unseal. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for unseal, like: unlock, free, remove, crack, break, open, seal, defective, reseal and unopened.