Where does “colníčka” come from?

colníčka (Slovak) comes from Slovak colník, from Slovak -ník, from Proto-Slavic -ьnikъ, from Proto-Slavic -ikъ — *nožь → *nožikъ; *větrъ → *větrikъ; *listъ →...

Ancestry of “colníčka”, step by step

Step	Language	Word	Meaning
1	Slovak	colník	customs officer
2	Slovak	-ník	Nominal suffix
3	Proto-Slavic	-ьnikъ	From base concept nouns, forms agent nouns who...
4	Proto-Slavic	-ikъ	nožь → nožikъ; větrъ → větrikъ; *listъ →...

Every word from Proto-Slavic -ikъ →Every word from Slovak -ník →Every word from Proto-Slavic -ьnikъ →