denotes that the agents perform the mutual actions among themselves, as in English constructions using "each other". In most cases, the transitive verbs are also used. In modern Scandinavian languages, the passive (or more properly mediopassive) voice is used for medial, especially reciprocal, constructions. Some examples from Danish are Maria og Peter skændes; "Mary and Peter are bickering", lit. "Mary and Peter are scolded by each other." Maria og Peter blev forlovet; "Mary and Peter got engaged [to each other]." (The hypothetical form **kysses (kiss each other) is not often—if ever—seen in Danish; however, it will likely be understood by most native speakers, indicating that the mediopassive voice is still at the very least potentially productive in Danish. An expression like "de kysses uafladeligt" (they kiss each other all the time) could very well be used for humorous purposes.) Autocausative "Autocausative" reflexive denotes that the (usually animate) "referent represented by the subject combines the activity of actor and undergoes a change of state as a patient": Anticausative "Anticausative" reflexive denotes that the (usually inanimate) subject of the verb undergoes an action or change of state whose agent is unclear or nonexistent. {|class="wikitable" |- !Language !Examples |- !Spanish |La puerta se abrió. |- !French |La porte s'est ouverte. |- !Italian |La porta si aprì. |- !Catalan |La porta es va obrir. |- !Galician |A porta abriuse. |- !Serbo-Croatian |Vrata su se otvorila. |- !Slovene |Vrata so se odprla. |- !Polish |Drzwi się otworzyły. |- !Russian |Дверь открылась.Dver' otkrylas. |- !German |Die Tür öffnete sich. |- !Lithuanian |Durys atsidarė. |- !English |The door opened. |} Intransitive or impersonal "Intransitive" forms (also known as "impersonal reflexive" or "mediopassive") are obtained by attaching the reflexive pronoun to intransitive verbs. The grammatical subject is either omitted (in pro-drop languages) or is a dummy pronoun (otherwise). Thus, those verbs are defective, as they have only the 3rd person singular (masculine or neuter, depending on language) form. In Slavic languages, practically "the only condition is that they can be construed as having a human agent. The applied human agent can be generic, or loosely specified collective or individual." In many cases, there is a semantic overlap between impersonal/anticausative/autocausative constructs and the passive voice (also present in all Romance and Slavic languages). On one hand, impersonal reflexive constructs have a wider scope of application, as they are not limited to transitive verbs like the canonical passive voice. On