early 15c., "united in one body, constituted as a legal corporation," as a number of individuals empowered to do business as an individual, in early use often of municipalities, from Latin corporatus, past participle of corporare "make or fashion into a body, furnish with a body," also "to make into a corpse, kill," from corpus (genitive corporis) "body" (from PIE root *kwrep- "body, form, appearance"). The past participle, corporatus, also was used as a noun meaning "member of a corporation."
In reference to any body of persons united in a community from c. 1600. Related: Corporately; corporateness.
word-forming element making nouns implying a practice, system, doctrine, etc., from French -isme or directly from Latin -isma, -ismus (source also of Italian, Spanish -ismo, Dutch, German -ismus), from Greek -ismos, noun ending signifying the practice or teaching of a thing, from the stem of verbs in -izein, a verb-forming element denoting the doing of the noun or adjective to which it is attached. For distinction of use, see -ity. The related Greek suffix -isma(t)- affects some forms.
<a href="https://www.etymonline.com/word/corporatism">Etymology of corporatism by etymonline</a>
Harper, D. (n.d.). Etymology of corporatism. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/corporatism