Where does “-άτικα” come from?

-άτικα (Greek) comes from Greek -άτικος, from Greek -ικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “-άτικα”, step by step

Step	Language	Word	Meaning
1	Greek	-άτικος	from nouns, denoting sense of time; "see" -άτικα
2	Greek	-ικός	Γαλλία + API → γαλλικός; Γαλλία + API →...
3	Ancient Greek	-ικός	of or pertaining to, in the manner of; -ic
4	Ancient Greek	-κός	forms adjectives with the sense of 'of or...
5	Proto-Indo-European	-ḱos	-y, -ic

Words derived from “-άτικα”

κυριακάτικα

Every word from Proto-Indo-European -ḱos →Every word from Ancient Greek -ικός →Every word from Ancient Greek -κός →