unblock

To remove or clear an obstruction from.

In whist, to play an unnecessarily high card, in order to avoid interrupting a partner’s long suit.

To remove or clear a block or obstruction from.

To free or make available.

make (assets) available

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

clear or remove an obstruction from