IMPERTURBABLE Synonyms: 45 Similar and Opposite Words

Q: How is the word 'imperturbable' different from other adjectives like it?

Some common synonyms of imperturbable are collected , composed , cool , nonchalant , and unruffled . While all these words mean "free from agitation or excitement," imperturbable implies coolness or assurance even under severe provocation. // the speaker remained imperturbable despite the heckling

Q: In what contexts can 'collected' take the place of 'imperturbable'?

The words collected and imperturbable are synonyms, but do differ in nuance. Specifically, collected implies a concentration of mind that eliminates distractions especially in moments of crisis. // the nurse stayed calm and collected

Q: When is 'composed' a more appropriate choice than 'imperturbable'?

Although the words composed and imperturbable have much in common, composed implies freedom from agitation as a result of self-discipline or a sedate disposition. // the composed pianist gave a flawless concert

Q: When can 'cool' be used instead of 'imperturbable'?

In some situations, the words cool and imperturbable are roughly equivalent. However, cool may imply calmness, deliberateness, or dispassionateness. // kept a cool head

Q: When is it sensible to use 'nonchalant' instead of 'imperturbable'?

While in some cases nearly identical to imperturbable , nonchalant stresses an easy coolness of manner or casualness that suggests indifference or unconcern. // a nonchalant driver

Q: When could 'unruffled' be used to replace 'imperturbable'?

While the synonyms unruffled and imperturbable are close in meaning, unruffled suggests apparent serenity and poise in the face of setbacks or in the midst of excitement. // harried but unruffled

imperturbable

adjective

ˌim-pər-ˈtər-bə-bəl

Definition of imperturbable next

as in nonchalant

not easily panicked or upset the chef was absolutely imperturbable—even when the kitchen caught on fire

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Synonym Chooser

How is the word imperturbable different from other adjectives like it?

Some common synonyms of imperturbable are collected, composed, cool, nonchalant, and unruffled. While all these words mean "free from agitation or excitement," imperturbable implies coolness or assurance even under severe provocation.

the speaker remained imperturbable despite the heckling

In what contexts can collected take the place of imperturbable?

The words collected and imperturbable are synonyms, but do differ in nuance. Specifically, collected implies a concentration of mind that eliminates distractions especially in moments of crisis.

the nurse stayed calm and collected

When is composed a more appropriate choice than imperturbable?

Although the words composed and imperturbable have much in common, composed implies freedom from agitation as a result of self-discipline or a sedate disposition.

the composed pianist gave a flawless concert

When can cool be used instead of imperturbable?

In some situations, the words cool and imperturbable are roughly equivalent. However, cool may imply calmness, deliberateness, or dispassionateness.

kept a cool head

When is it sensible to use nonchalant instead of imperturbable?

While in some cases nearly identical to imperturbable, nonchalant stresses an easy coolness of manner or casualness that suggests indifference or unconcern.

a nonchalant driver

When could unruffled be used to replace imperturbable?

While the synonyms unruffled and imperturbable are close in meaning, unruffled suggests apparent serenity and poise in the face of setbacks or in the midst of excitement.

harried but unruffled

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of imperturbable This low-volatility ascent since April quite resembles the imperturbable rally through all of 2017. —

Michael Santoli, CNBC, 25 Oct. 2025 Valeska is the movie’s stabilizing presence, imperturbable even in the face of potential natural disaster. —

David Rooney, The Hollywood Reporter, 25 Feb. 2025 Standing in the rostrum of the House of Representatives, a gavel in her hand and a look of imperturbable stoicism on her face, Ms. Harris officiated as the two houses of Congress met in joint session to formally count the Electoral College votes for president. —

Peter Baker, New York Times, 6 Jan. 2025 The team’s droll, imperturbable manager, Dave Roberts, spent much of his summer issuing medical briefings on infirm pitchers. —

Nicholas Dawidoff, The New Yorker, 3 Nov. 2024 See All Example Sentences for imperturbable

Recent Examples of Synonyms for imperturbable

Adjective

Scott inflicts Ohm’s nonchalant meanness with a piercingly perverse matter-of-factness that places the character as far away as possible from the realm of likeability.

— Carlos Aguilar, Variety, 15 Mar. 2026
Margot Robbie’s understanding of the assignment is evident, her fringe frame coupled with a low and loosely bound ponytail (another hallmark of the nonchalant set).

— Calin Van Paris, InStyle, 11 Mar. 2026