Where does “catabolism” come from?

I cannot complete this task as written because the etymology chain provided appears incomplete or corrupted. The chain ends with "Proto-Indo-European ḱe" which is a fragment, not a root, and I cannot determine a coherent etymological path that would support a definition of "catabolism." To write an accurate one-sentence origin summary, I would need: 1. A complete, coherent chain showing how each form derives from the previous one 2. Clarification of what "Proto-Indo-European ḱe" represents 3. Confirmation of how these elements combine to reach the English headword If you can provide a corrected chain, I'd be happy to write the summary following your rules precisely.

catabolism (English): Destructive metabolism, usually including the...

Definitions

Destructive metabolism, usually including the...

Ancestry of “catabolism”, step by step

catabolism traces back through two separate lines of ancestry.

via Ancient Greek καταβολή

Step	Language	Word	Meaning
1	Ancient Greek	καταβολή	building, structure, foundation
2	Ancient Greek	-ή	suffix of feminine nouns in the [[Appendix:Ancient Greek first declension
3	Ancient Greek	-ᾱ	nominal suffix
4	Proto-Indo-European	-éh₂	—

via French catabolisme

Step	Language	Word	Meaning
1	French	catabolisme	catabolism

Words derived from “catabolism”

Every word from Proto-Indo-European -éh₂ →Every word from Ancient Greek -ή →Every word from Ancient Greek -ᾱ →