Where does “kajecik” come from?

kajecik (Polish) comes from Polish kajet, from French cahier, from Old French quaer, from Latin quaternus, from Latin quater, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto — and.

Ancestry of “kajecik”, step by step

StepLanguageWordMeaning
1Polishkajetnotebook
2Frenchcahiernotebook, exercise book; quire
3Old Frenchquaer
4Latinquaternusfour each; four at a time
5Latinquaterfour times
6Latinquattŭorfour; 4
7Portuguesequartoordinal form of quatro; fourth; quarter; fourth;...
8Old Portuguesequartoquarter
9Latinquārtusfourth
10Proto-Indo-Europeankʷeturtos
11Proto-Indo-Europeankʷetwóresfour
12Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe-Every word from Proto-Indo-European kʷetwóresEvery word from Proto-Indo-European kʷeturtos