Where does “sí” come from?

sí (Catalan) comes from Latin sīc, from Latin sice, from Latin sī, from Proto-Italic sei, from Proto-Indo-European só — this; that.

sí (Catalan): yes; The opposite of 'not'

Definitions

  1. yes; The opposite of 'not'

Ancestry of “sí”, step by step

sí traces back through 3 separate lines of ancestry.

via Latin sīc

StepLanguageWordMeaning
1Latinsīcyes, indeed (If answering a question)
2Latinsice—
3Latinsīif, supposing that
4Proto-Italicseiso, thus
5Proto-Indo-Europeansóthis; that

via Latin sibi

StepLanguageWordMeaning
1Latinsibithe dative of the reflexive pronoun meaning to...
2Proto-Indo-Europeansébʰye—
3Proto-Indo-Europeanswéself

via Old Catalan si

StepLanguageWordMeaning
1Old Catalansi—
Every word from Proto-Indo-European só →Every word from Proto-Italic sei →Every word from Latin sī →