zıt: não, negativo, nem, nem a pau, nem morto, nem que a vaca tussa
köken: Inherited from Old Galician-Portuguese si (“yes”) (with nasalization of the vowel under the influence of não or mim), from Latin sīc (“thus; so”), from Proto-Indo-European *so (“this, that”).
köken: Etymology tree Proto-Indo-European *(h₁)ōd Proto-Balto-Slavic *ō Proto-Slavic *a Proto-Indo-European *h₂énos Proto-Balto-Slavic *anas Proto-Slavic *onъ Proto-Slavic *ono univ. Proto-Slavic *ano Old Polish ano Polish anoclip. Polish no Clipping of ano. First attested in the 19th century. Compare Czech no, Silesian no, Slovak no.