Where does “pirólisis” come from?

pirólisis (Spanish) comes from Spanish -lisis, from Ancient Greek λύσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

pirólisis (Spanish): pyrolysis

Definitions

pyrolysis

Ancestry of “pirólisis”, step by step

Step	Language	Word	Meaning
1	Spanish	-lisis	lysis
2	Ancient Greek	λύσις	loosing, releasing, release, ransoming;...
3	Ancient Greek	-σῐς	"suffix forming nouns"
4	Ancient Greek	-τις	retained after dentals
5	Proto-Indo-European	-tis	Derives abstract/action nouns from verb roots

Every word from Proto-Indo-European -tis →Every word from Ancient Greek -σῐς →Every word from Ancient Greek λύσις →