Where does “Арктика” come from?

Арктика (Yakut) comes from Russian А́рктика, from Latin arcticus, from Ancient Greek ἀρκτικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “Арктика”, step by step

Step	Language	Word	Meaning
1	Russian	А́рктика	—
2	Latin	arcticus	northern, arctic
3	Ancient Greek	ἀρκτικός	having to do with the Great Bear; northern lands;...
4	Ancient Greek	-ικός	of or pertaining to, in the manner of; -ic
5	Ancient Greek	-κός	forms adjectives with the sense of 'of or...
6	Proto-Indo-European	-ḱos	-y, -ic

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