aforesaid (adj.)

Middle English, from Old English onforan, contraction of prepositional phrase on foran "before in place, at the beginning of, in front of," from on (prep.), see a- (1), + foran (adv.) "in front," dative of for. In some cases probably it represents Old English ætforan "at-fore."

Attested from early 14c. as a preposition, "before in time," and as a conjunction, "earlier than the time when, before." Once the literary equivalent of before, it now has been replaced by that word except in nautical use, colloquial dialects, and in combinations such as aforesaid, aforethought.

"named or mentioned before," c. 1300, past-participle adjective from say (v.). Expression all is said and done is from 1550s.

"that has gone by, past," early 15c., from by (adv.) + gone. Compare similar construction of aforesaid. As a noun from 1560s (see bygones).