Where does “kasować” come from?

kasować (Silesian) comes from Polish kasować, from Latin cassō, from Latin cassus, from Latin cadō, from Proto-Italic kadō, from Proto-Indo-European ḱad- — to fall.

Ancestry of “kasować”, step by step

Step	Language	Word	Meaning
1	Polish	kasować	to validate, to punch
2	Latin	cassō	to nought, to annul, to nullify, to cassate
3	Latin	cassus	hollow, empty, devoid of something; lacking;...
4	Latin	cadō	to fall, to fall out
5	Proto-Italic	kadō	fall, sink
6	Proto-Indo-European	ḱad-	to fall

Every word from Proto-Indo-European ḱad- →Every word from Proto-Italic kadō →Every word from Latin cadō →