Usages of kołnierzyk
Mój kołnierzyk jest szeroki, więc zaraz mi go zwęzi.
My collar is wide, so he will take it in for me right away.
Ten krawiec szyje mi kołnierzyk.
This tailor is sewing a collar for me.
Elon.io is an online learning platform
We have an entire course teaching Polish grammar and vocabulary.