word-forming element meaning "before," from Old French pre- and Medieval Latin pre-, both from Latin prae (adverb and preposition) "before in time or place," from PIE *peri- (source also of Oscan prai, Umbrian pre, Sanskrit pare "thereupon," Greek parai "at," Gaulish are- "at, before," Lithuanian prie "at," Old Church Slavonic pri "at," Gothic faura, Old English fore "before"), extended form of root *per- (1) "forward," hence "beyond, in front of, before."
The Latin word was active in forming verbs. Also see prae-. Sometimes in Middle English muddled with words in pro- or per-.
"act of arraigning, act of putting in proper order," 1740, from French arrangement (Old French arengement), from arranger "arrange" (see arrange). Meaning "that which is put in order, combination of parts or materials" is from 1800. Sense in music is from 1813. Meaning "final settlement, adjustment by agreement" is from 1855.
Others are reading
<a href="https://www.etymonline.com/word/pre-arrangement">Etymology of pre-arrangement by etymonline</a>
Harper, D. (n.d.). Etymology of pre-arrangement. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/pre-arrangement