Where does “trápit” come from?

trápit (Czech) comes from Old Czech trápiti, from Proto-Slavic torpiti, from Proto-Slavic tьrpěti — to suffer; to endure.

Ancestry of “trápit”, step by step

Step	Language	Word	Meaning
1	Old Czech	trápiti	—
2	Proto-Slavic	torpiti	—
3	Proto-Slavic	tьrpěti	to suffer; to endure

trápit — Etymology, Origin & Word History | Etymology Explorer