Where does “Niepsuj” come from?

Niepsuj (Polish) comes from Polish psuj, from Polish psuć, from Old Polish -ć, from Old Polish ty, from Proto-Slavic ty, from Proto-Balto-Slavic tūˀ, from Proto-Indo-European túh₂ — you, thou.

Ancestry of “Niepsuj”, step by step

StepLanguageWordMeaning
1Polishpsujspoiler; spoilsport; ruiner; troublemaker;...
2Polishpsućto ruin, to spoil; to break, to break down; to go...
3Old Polishforms
4Old Polishtysingular non-formal second person pronoun thou, you
5Proto-Slavictyyou
6Proto-Balto-Slavictūˀyou
7Proto-Indo-Europeantúh₂you, thou
Every word from Proto-Indo-European túh₂Every word from Proto-Balto-Slavic tūˀEvery word from Proto-Slavic ty