Etymology: [ sO, esp before adj or adv f ] (adverb.) before 12th century. From Middle English, so, swo, from Old English swā (“so”), from Proto-Germanic *swa, *swē (“so”), from Proto-Indo-European *swē, *swō (reflexive pronomial stem). Cognate with West Frisian sa (“so”), Dutch zo (“so”), German so (“so”), Danish så (“so”), Old Latin suad (“so”), Ancient Greek ὡς (hōs, “as”).
Synonyms: correct, like this, much, musical, one of the family, one of them, really, right, so that, that, that way inclined, this, thus, true, truly, very, yea