unblock
verb
[ ʌnˈblɒk ]
• remove an obstruction from (something, especially a pipe or drain).
• "a gadget to unblock sinks quickly"
• restore access to or the use of (email or a website or mobile phone).
• "crooks are using software to unblock the phones so they can be resold"
• play in such a way that (a long suit) becomes established.
• "this unblocking play was identified by a Viennese whist player"
