simplify (v.) Look up simplify at Dictionary.com
1650s, from French simplifier "to make simpler" (15c.), from Medieval Latin simplificare "to simplify," from Latin simplex "simple" (see simplex) + comb. form of facere "to make" (from PIE root *dhe- "to set, put"). Meaning "to make easier to do" is from 1759. Related: Simplified; simplifying.