The antipassive voice (abbreviated ANTIP or AP) is a type of grammatical voice that either does not include the object or includes the object in an oblique case. This construction is similar to the passive voice, in that it decreases the verb's valency by one – the passive by deleting the agent and "promoting" the object to become the subject of the passive construction, the antipassive by deleting the object and "promoting" the agent to become the subject of the antipassive construction.