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Synonyms

complicated

American  
[kom-pli-key-tid] / ˈkɒm plɪˌkeɪ tɪd /

adjective

  1. composed of elaborately interconnected parts; complex.

    complicated apparatus for measuring brain functions.

  2. difficult to analyze, understand, explain, etc..

    a complicated problem.

    Synonyms:
    knotty, tangled, involved

complicated British  
/ ˈkɒmplɪˌkeɪtɪd /

adjective

  1. made up of intricate parts or aspects that are difficult to understand or analyse

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • complicatedly adverb
  • complicatedness noun
  • uncomplicated adjective

Etymology

Origin of complicated

First recorded in 1640–50; complicate + -ed 2

Explanation

When things get complicated, they are no longer simple and straightforward. If you are asked a question that would require a long, detailed answer, you might just say, "It's complicated." The word complicated came about in the 1640's to mean "tangled" or "difficult to unravel." This makes sense, considering it came from the Latin verb complicāre, meaning "to fold together." Consider that something with many folds is more complicated than something flat. Novelist Robert Ludlum said, "Life is extremely complicated," but Confucius long ago suggested that "Life is really simple, but we insist on making it complicated." Just having those two opposing viewpoints indicates how complicated life can be.

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Vocabulary lists containing complicated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"This project involved more complicated logistics than any I've been involved with in my career. So many moving parts, and so much talent among the scientists, drillers and support staff," Briner says.

From Science Daily • Apr. 18, 2026

It’s a Homeric voyage, if Homer were familiar with the complicated system of roadways and toll stations that is the New Jersey Turnpike.

From Salon • Apr. 18, 2026

The most complicated case of the finale episode comes when a patient needs emergency surgery to extract her baby, then a second team in the room works to save the oxygen-starved newborn.

From The Wall Street Journal • Apr. 17, 2026

Alessandra Malito writes the Help Me Retire column, in which she digs deeply to assist MarketWatch readers navigating complicated sets of rules on retirement planning, taxes and government benefits.

From MarketWatch • Apr. 17, 2026

It’s hard to make simple out of complicated, like trying to make a straight line out of a tangled knot.

From "Rump: The (Fairly) True Story of Rumpelstilskin" by Liesl Shurtliff