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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.

Keep Reading on Vocabulary.com

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.

It’s preposterous to think that, even with the best of intentions on both sides, a peace as complicated as this could have been settled in one day.

From Slate • Apr. 13, 2026

“A Good Day’s Work” sets out to recast Moses as more complicated than the cheerful, childlike images her name conjures and as a legitimizer of self-taught art.

From The Wall Street Journal • Apr. 11, 2026

It's easy to think that all seven are competitive everywhere, but it is more complicated than that.

From BBC • Apr. 11, 2026

“They’re getting more complicated, like with wetness indicators and things that bring in new chemicals into the mix and that aren’t clearly disclosed to consumers and to parents.”

From Los Angeles Times • Apr. 10, 2026

He offers Leo his hand and they do some complicated handshake.

From "Clairboyance" by Kristiana Kahakauwila