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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.

But there may be a more complicated demographic story factoring in.

From Slate • May 4, 2026

"In practice, what that led to was the removal of Indian jet fuel from the European market en masse. It just became too complicated," explains Amaar Khan of Argus Media.

From BBC • May 3, 2026

California has complicated requirements, though, for proving that one has truly moved beyond the reach of state tax collectors.

From The Wall Street Journal • May 2, 2026

Leave all “Oh, Mary!” jokes aside before you start this well-researched biography of President Lincoln’s complicated spouse.

From Los Angeles Times • May 1, 2026

The reasons for the rise of abolition—the movement to end slavery—in the Northern states are complicated.

From "In the Shadow of Liberty" by Kenneth C. Davis