Where does “heroicidade” come from?

heroicidade (Portuguese) comes from Portuguese heróico, from Latin heroicus, from Ancient Greek ἡρωϊκός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “heroicidade”, step by step

Step	Language	Word	Meaning
1	Portuguese	heróico	heroic
2	Latin	heroicus	heroic, epic
3	Ancient Greek	ἡρωϊκός	of the heroes
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 →