UNBLOCK
Meaning of UNBLOCK in English
/ ˌʌnˈblɒk; NAmE -ˈblɑːk/ verb
[ vn ] to clean sth, for example a pipe, by removing sth that is blocking it
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005