Where does “constitutional” come from?

Constitutional derives from English constitution, from Latin constitutio, from constituo meaning to establish or set up, formed with the prefix con-.

constitutional (English): Belonging to, or inherent in, the constitution or...

Definitions

Step	Language	Word	Meaning
1	English	constitution	The act, or process of setting something up, or...
2	Middle English	constitucioun	An ecclesiastical decree or rule, especially one...
3	Old French	constitucion	constitution
4	Latin	cōnstitūtiō	a constitution, disposition, nature, character
5	Latin	cōnstituō	to place, put, locate, lay
6	Latin	cōn-	Used in compounds to indicate a being or bringing together of several objects
7	Latin	cum	with, along with; at; -fold
8	Old Latin	com	Alternative form of cum
9	Proto-Italic	kom	with, along, at
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	putty certain kinds of cement used for fixing e.g. window panes
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
18	Proto-Indo-European	gū-	to bend; curve; arch; vault; to bow, bend, arch,...