Where does “sec-” come from?

sec- (English) comes from Czech co, from Old Czech čso, from Proto-Slavic česo, from Proto-Slavic čь, from Proto-Balto-Slavic ki, from Proto-Indo-European kʷíd, from Proto-Indo-European kʷís, from Proto-Indo-European kʷi- — interrogative base.

sec- (English): secondary-form of a functional group, a branched...

Definitions

  1. secondary-form of a functional group, a branched...

Ancestry of “sec-”, step by step

sec- traces back through two separate lines of ancestry.

via Czech co

StepLanguageWordMeaning
1Czechcowhat; that; isn't it so, don't you think?
2Old CzechčsoInterrogative pronoun; what
3Proto-Slavicčesowhat (interrogative)
4Proto-Slavicčьwhat; alternative form of *čьto
5Proto-Balto-Slavickiwhat
6Proto-Indo-Europeankʷídneuter nominative/accusative singular of *kʷís
7Proto-Indo-Europeankʷíswho, what; who, which, that; which, what
8Proto-Indo-Europeankʷi-interrogative base

via Kamkata-viri duċ

StepLanguageWordMeaning
1Kamkata-viriduċten
2Proto-Nuristani*daċaten
3Proto-Indo-Iraniandáćaten
4Proto-Indo-Europeandéḱm̥ten

Words derived from “sec-

Every word from Proto-Indo-European kʷi-Every word from Proto-Indo-European kʷísEvery word from Proto-Indo-European kʷíd