Where does “Czajka” come from?

Czajka (English) comes from Polish Czajka, from Old Polish czajka, from Proto-Slavic čajьka, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “Czajka”, step by step

Step	Language	Word	Meaning
1	Polish	Czajka	—
2	Old Polish	czajka	—
3	Proto-Slavic	čajьka	gull
4	Proto-Slavic	-ьka	—
5	Proto-Balto-Slavic	-ikaʔ	—
6	Proto-Indo-European	-ikeh₂	—

Every word from Proto-Indo-European -ikeh₂ →

Czajka — Etymology, Origin & Word History | Etymology Explorer