Origin: 1425–75; late Middle English < Late Latin implēmentum a filling up, equivalent to Latin implē(re) to fill up (im-im-1 + plēre to fill) + -mentum-ment
1454, from L.L. implementem "a filling up" (as with provisions), from L. implere "to fill," from in- "in" + plere "to fill" (see plenary). Sense of "tool" is 1538, from notion of things provided to do work, that which "fills up" a house, etc. The verb is 1806, originally