Where does “-ik” come from?

-ik (Polish) comes from Latin -icus, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

-ik (Polish): Forms diminutive nouns

Definitions

Step	Language	Word	Meaning
1	Latin	-icus	belonging to; derived from; of or pertaining to;...
2	Ancient Greek	-ικός	of or pertaining to, in the manner of; -ic
3	Ancient Greek	-κός	forms adjectives with the sense of 'of or...
4	Proto-Indo-European	-ḱos	-y, -ic