Where does “subactivity” come from?

subactivity (English) comes from English activity, from Middle French activité, from Latin activitas, from Latin āctīvus, from Ancient Greek ἐνεργητικός, from Ancient Greek ἐνεργέω, from Ancient Greek ἐνεργός, from Ancient Greek ἐν- — Creates collective nouns, which refer to groups...

subactivity (English): An activity making up part of a larger activity

Definitions

An activity making up part of a larger activity

Ancestry of “subactivity”, step by step

Step	Language	Word	Meaning
1	English	activity	The state or quality of being active; activeness;...
2	Middle French	activité	—
3	Latin	activitas	activity, movement, action
4	Latin	āctīvus	—
5	Ancient Greek	ἐνεργητικός	Able to act on; acting on; Active; In the active...
6	Ancient Greek	ἐνεργέω	to be in action or activity, to operate; to...
7	Ancient Greek	ἐνεργός	at work, active
8	Ancient Greek	ἐν-	in, within; on
9	Ancient Greek	ἐν	in, on, at; among; in, at, or during the time of
10	Ancient Greek	δέρμα	skin, hide
11	Ancient Greek	γλυφή	carving, carved work; hole cut
12	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
13	Proto-Indo-European	-íh₂	—
14	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...

Every word from Proto-Indo-European -h₂ →

subactivity — Etymology, Origin & Word History | Etymology Explorer