subtle

American  

[suht-l] / ˈsʌt l /

adjective

subtler, subtlest

1. thin, tenuous, or rarefied, as a fluid or an odor.

2. fine or delicate in meaning or intent; difficult to perceive or understand.

   subtle irony.

3. delicate or faint and mysterious.

   a subtle smile.

4. requiring mental acuteness, penetration, or discernment.

   a subtle philosophy.

5. characterized by mental acuteness or penetration.

   a subtle understanding.

6. cunning, wily, or crafty.

   a subtle liar.

   Synonyms:

   slick, foxy, tricky, sly

7. insidious in operation.

   subtle poison.

8. skillful, clever, or ingenious.

   a subtle painter.

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subtle British  

/ ˈsʌtəl /

adjective

1. not immediately obvious or comprehensible

2. difficult to detect or analyse, often through being delicate or highly refined

   a subtle scent

3. showing or making or capable of showing or making fine distinctions of meaning

4. marked by or requiring mental acuteness or ingenuity; discriminating

5. delicate or faint

   a subtle shade

6. cunning or wily

   a subtle rogue

7. operating or executed in secret

   a subtle intrigue

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Other Word Forms

• hypersubtle
  adjective
• hypersubtleness
  noun
• nonsubtle
  adjective
• nonsubtleness
  noun
• oversubtle
  adjective
• pseudosubtle
  adjective
• subtleness
  noun
• subtly
  adverb
• unsubtle
  adjective
• unsubtleness
  noun

Etymology

Origin of subtle

First recorded in 1250–1300; Middle English sotil, from Old French, from Latin subtīlis “subtile” (the b of modern spelling is from Latin ); see subtile

Explanation

Something that is subtle is not obvious: a professional food taster might be able to perceive subtle differences of flavor that most people don't notice. Subtle is used for things that are hard to describe because of their complexity or delicacy: a way of thinking, arguing, or creating a work of art. The word is pronounced like "suttle" and it was originally spelled that way when it was borrowed from Old French, but the b got imported to make the word look more like its ultimate source, the Latin adjective subtilis. But don't pronounce the b — that won't be very subtle!

Example Sentences

Part of the problem is that many of the subtle land formations scientists need to study to uncover evidence of past quakes have already been built over.

From Los Angeles Times • May 4, 2026

"Unfortunately, this right is often violated — sometimes blatantly, sometimes in more subtle ways," he said.

From Barron's • May 3, 2026

The New York Times comments on his "subtle rebuttals" to Trump, while Le Monde said it took a King from the UK to remind US politicians of "the habit of sophisticated speeches".

From BBC • Apr. 29, 2026

"Because the two species were capable of producing offspring together, their interactions were likely complex, involving competition, occasional interbreeding and other subtle population dynamics."

From Science Daily • Apr. 28, 2026

Boo was not subtle about his hint: Go forth and comfort!

From "Aru Shah and the End of Time" by Roshani Chokshi

Related Words

• exquisite
• faint
• indirect
• ingenious
• profound
• slight
• sophisticated
• understated