Audacious

adjective
Frequency
Medium-Low
CEFR Level
C1
Register
Neutral
Domain
General / Character
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Definition

1. (adjective) Extremely bold and daring — willing to take big risks or do things that most people would be too scared to try.
2. (adjective) Shockingly rude or disrespectful — showing a level of nerve that surprises or offends people.
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Context Alive

A 22-year-old walks into a meeting with investors and says she wants to build the world's first affordable electric plane. Everyone in the room looks at each other. She has no experience in aviation, no funding, and no prototype. But her presentation is so detailed and her confidence so real that by the end of the meeting, two investors write cheques. Your colleague whispers: "That was the most audacious pitch I've ever seen — and it actually worked."
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Meanings

2 meanings
1 Extremely Bold and Daring (Adjective) Common
This meaning is about doing something incredibly brave, ambitious, or risky — the kind of thing that makes people's jaws drop because most wouldn't dare try it. Imagine a small startup challenging the biggest tech company in the world with an audacious plan to build a better product with a fraction of the budget. This is describing boldness that goes way beyond normal — it's the kind that either leads to spectacular success or spectacular failure. You might read "an audacious rescue mission" about soldiers who flew into enemy territory at night to save hostages, or someone could call a business plan "audacious" when it aims to do something nobody has done before. Or think about an artist who paints a massive mural on the side of a government building without permission — it's audacious because it takes real nerve. The word suggests a mix of courage, ambition, and a willingness to ignore the odds.
✏️ When audacious describes boldness, it's almost always a compliment — or at least carries admiration, even if the action was risky. People use it for big, impressive moves: audacious goals, audacious plans, audacious decisions. It's stronger than "brave" or "bold" — it suggests something that makes people say "I can't believe they actually did that."
2 Shockingly Rude or Disrespectful (Adjective) Less Common
This meaning is about behaviour so rude or shameless that it surprises people — someone doing something that crosses a line and not caring at all. Imagine a guest at your dinner party criticising the food loudly, asking for a different meal, and then complaining that the wine is cheap — that kind of behaviour is audacious because most people would never dream of being that rude. This is describing nerve in a negative way — someone acting without shame or respect. You might hear "how audacious of him to show up after what he did" about someone who hurt others and then appeared as if nothing happened, or someone could say "that's an audacious lie" about a claim so obviously false it's insulting. Or think about an employee who takes credit for their colleague's work in front of the whole team — that's audacious because it takes a shocking level of nerve. The word suggests disbelief at how far someone is willing to go.
✏️ Context is everything with this meaning. When someone says "audacious" with anger or disbelief in their voice, it usually means "how dare they." It's close to the word audacity: "he had the audacity to ask for a raise after missing a week of work." The noun audacity is actually more commonly used in this negative sense than the adjective.
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Common Patterns

Basic Structures
an audacious + noun the standard pattern — describing something bold or shocking
It was an audacious plan that nobody believed would work.
audacious enough to + verb bold or shameless enough to do something surprising
She was audacious enough to walk straight into the CEO's office without an appointment.
how audacious expressing shock or disbelief at someone's nerve
He copied my entire essay and submitted it as his own — how audacious.
Common Structures
audacious move / decision / step a bold action that carries big risk
Leaving a safe job to start a company was an audacious move, but it paid off.
the audacity to + verb noun form expressing shock at someone's nerve — usually negative
He had the audacity to blame everyone else for his own mistake.
bold and audacious a common pairing that emphasises extreme courage
The escape plan was bold and audacious — and somehow it worked.
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Collocations

10 collocations
audacious plan
a plan so bold and ambitious that it surprises people
audacious move
a risky action that takes real courage or nerve
audacious goal
an extremely ambitious target that most would consider unrealistic
audacious attempt
a daring try at something very difficult
audacious decision
a choice that involves big risks and big potential rewards
audacious lie
a lie so bold and obvious it's almost insulting
audacious heist
a robbery so bold and clever it becomes legendary
audacious claim
a statement so bold that people struggle to believe it
the audacity
the nerve or shamelessness — usually expressing disbelief
bold and audacious
an emphatic pairing that stresses extreme daring
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Example Sentences

10 examples
1
It was the most audacious escape in prison history — three men dug a tunnel with spoons.
It was the boldest prison escape ever — three inmates tunnelled out using nothing but spoons.
2
Her audacious business plan attracted investors who loved her fearless approach.
Her extremely ambitious business plan won over investors who admired her courage.
3
He had the audacity to ask for a refund after eating the entire meal.
He had the nerve to demand his money back after finishing every bite of the food.
4
The bank robbery was so audacious that it became the subject of a Hollywood film.
The robbery was so daring and dramatic that a major movie was made about it.
5
Quitting your job to travel the world at 50 is an audacious move — I admire it.
Leaving your career to travel at 50 takes serious guts — I respect that decision.
6
That's an audacious claim — do you have any evidence to support it?
That's an extremely bold statement — can you actually back it up?
7
The team made an audacious decision to change their entire strategy two days before the final.
The team took a huge gamble by completely rethinking their approach just two days before the big match.
8
How audacious of him to show up uninvited and act like nothing happened.
I can't believe he had the nerve to turn up without being asked and pretend everything was fine.
9
The architect's audacious design turned an abandoned warehouse into a stunning art gallery.
The architect's daringly creative design transformed a forgotten warehouse into a breathtaking gallery.
10
She was audacious enough to challenge the professor's theory in front of the whole lecture hall.
She was bold enough to question the professor's theory with the entire lecture hall watching.
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Synonyms & Antonyms

6 items
✅ Synonyms
bold
more common and everyday — less dramatic than audacious
daring
similar energy — suggests willingness to take risks, slightly less intense
brazen
leans more negative — shamelessly bold, often used for bad behaviour
❌ Antonyms
timid
the direct opposite — too scared or shy to take risks
cautious
careful and risk-averse — the opposite of daring
modest
understated and humble — the opposite of audacious ambition