Antonyms of verb simplify

1 sense of simplify

Sense 1
simplify -- (make simpler or easier or reduce in complexity or extent; "We had to simplify the instructions"; "this move will simplify our lives")
       Antonym of complicate (Sense 1)
      => complicate, perplex -- (make more complicated; "There was a new development that complicated the matter")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb simplify

1 sense of simplify

Sense 1
simplify -- (make simpler or easier or reduce in complexity or extent; "We had to simplify the instructions"; "this move will simplify our lives")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")