clear or remove an obstruction from;
"the procedure unblocked his arteries"
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
make (assets) available;
"release the holdings in the dictator's bank account"
- A telephone call between Mary and Jack will unblock the whole situation.
- We had to call a plumber to unblock the drains.
- Father told me to unblock the pipe to let the water run through.
- block 街区