1275-1325;Middle Englishsufficen < Latinsufficere to supply, suffice, equivalent to suf-suf- + -ficere, combining form of facere to make, do1; replacing Middle Englishsuffisen < Old French < Latin, as above
early 14c., from stem of O.Fr. souffire "be sufficient," from L. sufficere "supply, suffice," from sub "up to" + root of facere "to make" (see factitious). Phrase suffice it to say (late 14c.) is a rare surviving subjunctive.