Where does “bathypélagique” come from?

bathypélagique (French) comes from French pélagique, from Latin pelagicus, from Ancient Greek πελαγικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

bathypélagique (French): bathypelagic

Definitions

bathypelagic

Ancestry of “bathypélagique”, step by step

Step	Language	Word	Meaning
1	French	pélagique	pelagic
2	Latin	pelagicus	pelagic
3	Ancient Greek	πελαγικός	—
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 →