#1
unblock v. clear or remove an obstruction from; "the procedure unblocked his arteries"
. wn #2
unblock v. 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
. wn #3
unblock v. [
unfreeze, free, release] make (assets) available; "release the holdings in the dictator's bank account"
. wn