Where does “supererogation” come from?

Supererogation comes from Latin supererogatio, from supererogare meaning to ask beyond, from super and rogare meaning to ask, from ex and the Proto-Indo-European root eǵ-.

supererogation (English): An act of doing more than is required; An action...

Definitions

An act of doing more than is required; An action...

Ancestry of “supererogation”, step by step

Step	Language	Word	Meaning
1	Latin	superērogātiō	—
2	Latin	superērogō	—
3	Latin	ērogō	—
4	Latin	ex	A name of the letter "X"; out of, from
5	Latin	commūnicō	—
6	Latin	commūnis	—
7	Old Latin	com(m)oinis	—
8	Proto-Italic	kommoinis	—
9	Proto-Indo-European	ḱom-moy-ni-	held in common
10	Proto-Indo-European	ḱóm	beside, near, by, with
11	Proto-Indo-European	ḱe	Deictic particle, here; Post-positional...
12	Middle English	kyt	—
13	German	kitt	—
14	Old High German	kuti	—
15	Proto-West Germanic	kwidu	gum, resin
16	Proto-Germanic	kweduz	resin
17	Proto-Indo-European	gʷet-	resin, gum; to say, speak

Every word from Proto-Indo-European gʷet- →

supererogation — Etymology, Origin & Word History | Etymology Explorer