unblock

verb

remove obstacles

Wiktionary

Pronunciation: /ʌnˈblɒk/

noun

Etymology: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English block English unblock From un- + block.

The removal of a block or blockage.
“Look for every opportunity to create an entry to the weak hand. Spectacular unblocks are often needed.”
“Control messages, such as requests/forwards/unblocks, are often shorter as they need to carry the address and some header information, while data messages, such as responses, are cache-line sized with some extra header information.”

verb

To remove or clear a block or obstruction from.
“We need a plumber to unblock the sink.”
“During this period, Network Rail was able to unblock a culvert and stabilise a high-risk landslip at Beattock, and to stabilise a high-risk landslip site at Ravenstruther (near Carstairs).”
To free or make available.
“It is not just bad news about Dubai that gets blocked from the Internet; […] a whole range of other social networking sites have been blocked, unblocked and reblocked.”
In whist, to throw away a high card so as not to interrupt one's partner's long suit.
To enable communication again, via telephone, instant messaging, etc., with (somebody previously blocked).