Conjugation of the verb отпереть, 1st conjugation, perfective aspect 
unlock
See also:
отпирать,
imperfective aspect
Изъявительное наклонение
настоящее время
-прошедшее время
будущее время
Сослагательное наклонение
Повелительное наклонение
(ты)(вы)
Причастия и деепричастия
причастие
Действительный залогСтрадательный залог
деепричастие
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