- -sk reflexive suffix in words of Danish origin (e.g. BASK (Cf. bask), lit. "to bathe oneself"), contracted from O.N. sik, reflexive pronoun corresponding to Goth. sik, O.H.G. sih, Ger. sich "himself, herself, itself," from PIE root *se- (Cf. L. se "himself").
Etymology dictionary. 2014.