An agent-demoting voice construction where the realization of the demoted agent is not obligatory (against Inverse). In terminological systems that distinguish "InverseVoice" from "Passive" (e.g., Givon, 1988), this is the "Passive" concept. (Ch. Chiarcos) Associated with actions performed on the subject by an unspecified agent. (McIntosh 1984:108) Refers to the category of verb forms, typically identifies with a specific morphological marking, that encode the derived diatheses in which the agent role is not linked with a subject noun phrase (Shibatani 1995:7) (http://purl.org/linguistics/gold/Passive)