Where does “рочок” come from?

рочок (Ukrainian) comes from Ukrainian -ок, from Proto-Slavic -ъkъ, from Proto-Slavic -kъ, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

Ancestry of “рочок”, step by step

StepLanguageWordMeaning
1Ukrainian-окtakes masculine nouns, produces diminutive masculine nouns, sometimes with further sense development
2Proto-Slavic-ъkъForms diminutives from old u-stem nouns;...
3Proto-Slavic-kъDeverbal, forms token nouns; From expressive or...
4Proto-Indo-European-kosCreates deadjectival and desubstantival...
Every word from Proto-Indo-European -kosEvery word from Proto-Slavic -kъEvery word from Proto-Slavic -ъkъ