Reflexive constructions in Polish

Polish, an Indo-European language of the West Slavic sub-branch, has three types
of reflexive constructions. The coreference between agent and patient participant
roles can be expressed by one of the following reflexivizers: siebie, swój, or się. The
first reflexive nominal siebie shares the inflectional pattern with the personal
pronoun, which is uncommon from a crosslinguistic perspective. The second reflexive
nominal swój is used in the context of the 3rd person to make a formal distinction
between 3rd person reflexive possessive pronouns and their nonreflexive
counterparts. Finally, the reflexive clitic się is verbal, modifying the syntactic and semantic
value of the verbal valency. Even if się is particularly frequent in impersonal
constructions, its omnipresence in middle or reflexive domains is also non-negligible.
Like in many Slavic languages, się may also encode the antipassive function.