unblock

(verb) clear or remove an obstruction from. Example: "The procedure unblocked his arteries."

(verb) play the cards of (a suit) so that the last trick on which a hand can follow suit will be taken by a higher card in the hand of a partner who has the remaining cards of a combined holding.

(verb) make (assets) available. Synonyms: unfreeze, free, release. Example: "Release the holdings in the dictator's bank account."