simple past tense and past participle of complicate
"The engineer complicated the original design by adding unnecessary extra parts."
In plain English: To make something complicated is to mix many different parts together so it becomes hard to figure out how everything works.
"The software update complicated his schedule by requiring him to restart his computer three extra times."
difficult to analyze or understand
"a complicated problem"
"complicated Middle East politics"
"he's more complex than he seems on the surface"
Difficult or convoluted.
"The new software update introduced a complicated process that confused many users."