Trivia Time

In calling one of his novels The Subtle Knife, what does Philip Pullman convey about the knife?

Test Your Knowledge

subtle

American  

[suht-l] / ˈsʌt l /

adjective

• subtler,
  comparative
• subtlest
  superlative

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.

---

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

---

Other Word Forms

Derived Forms

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

Inflected Forms

Adjectives

• subtler
  comparative
• subtlest
  superlative

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

See Examples For:

subtle subtler subtlest

But, as originally written, “Life is a narrow bridge and the important thing, do not make oneself afraid,” reflects an important but subtle difference to “do not be afraid.”

From The Wall Street Journal ● Oct. 5, 2026

These include having software that smooths out rapid acceleration, adding sound systems and subtle seat vibrations to signal to passengers that the car is moving, and offering adaptive regenerative braking that reduces sudden deceleration.

From BBC ● Oct. 3, 2026

Attackers can deliberately alter fake videos in subtle ways designed to confuse a detector and make manipulated footage appear authentic.

From Science Daily ● Oct. 1, 2026

Hathaway is arch and expressive, doing subtle things with her eyes and voice that no one else can.

From Los Angeles Times ● Oct. 1, 2026

The young women wondered if the attention to detail was a subtle challenge.

From "A Thousand Sisters" by Elizabeth Wein

As particle accelerators became more powerful and detectors grew increasingly sensitive, researchers gained access to subtler physical processes.

From Science Daily ● Sep. 2, 2026

Critics, including the leadership of SAG-AFTRA, counter that the displacement is already at hand in subtler ways, with background roles and commercials increasingly filled by digital doubles rather than human performers.

From Los Angeles Times ● Jul. 13, 2026

It remains to be seen whether “Kitchen Undercover” will rely on prosthetics, fake mustaches or merely the subtler costume of the unrecognized employee.

From Salon ● Jul. 5, 2026

More mature consumers are likely to stick with natural, subtler looks, she said.

From MarketWatch ● Feb. 7, 2026

It remains to be proved; Estraven and I proved nothing except perhaps a rather subtler point.

From "The Left Hand of Darkness" by Ursula K. Le Guin

Inflation is one of the economy’s most important vital signs and one of the subtlest to measure.

From The Wall Street Journal ● Aug. 12, 2026

The subtlest animation looks the best, especially when sunlight dapples upon fur or felines flex their claws to assert power.

From Los Angeles Times ● Dec. 19, 2024

Through the warm friendship of Tara and Karan, the series also imparts one of its subtlest takes on relationships.

From BBC ● Aug. 18, 2023

“Since you asked, it was the subtlest form of expression known to humans. The first novel was probably Murasaki Shikibu’s ‘Tale of Genji,’ written in the 11th century.

From New York Times ● May 1, 2023

Madison possessed the subtlest and most intellectually sophisticated understanding of the choices facing the new American republic of any member of the revolutionary generation.

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis

Related Words

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