Where does “Deckelung” come from?

Deckelung (German) comes from German -ung, from Middle High German -ung, from Old High German -unga, from Proto-Germanic -ungō — -ing, -ion. "Forms gerund nouns from verbs.".

Deckelung (German): cap artificial upper limit or ceiling

Definitions

cap artificial upper limit or ceiling

Ancestry of “Deckelung”, step by step

Step	Language	Word	Meaning
1	German	-ung	-ing; "forms nouns from verbs, usually describing...
2	Middle High German	-ung	—
3	Old High German	-unga	-ing
4	Proto-Germanic	-ungō	-ing, -ion. "Forms gerund nouns from verbs."

Every word from Proto-Germanic -ungō →Every word from German -ung →Every word from Old High German -unga →