untroubled by + cause
Showing lack of disturbance
Use by for things that do not disturb or affect someone.
untroubled by criticism
untroubled by the storm
How to use “untroubled” with prepositions
Untroubled is most commonly followed by by or about depending on the meaning.
Quick answer
Use “untroubled by” for causes and “untroubled about” for worries
Untroubled by means not affected or bothered by something. Untroubled about means not worried about something. In, on, and at usually belong to the wider sentence rather than directly to the adjective.
She seemed untroubled by the noise.
He was surprisingly untroubled about the delay.
The children slept untroubled in the next room.
He was surprisingly untroubled about the delay.
The children slept untroubled in the next room.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
untroubled about + issue
Showing lack of worry
Use about for topics or situations someone is not worried about.
untroubled about the exam
untroubled about public opinion
untroubled in + situation
Adding context or location
In usually introduces the situation or place.
She remained untroubled in difficult conditions.
untroubled at + event
Referring to reactions
At may introduce an event or sight that causes no concern.
He looked untroubled at the sudden change.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
untroubled by
They were untroubled by the rumours.
Not disturbed or affected by something.
untroubled about
She seemed untroubled about the results.
Not worried about a topic or situation.
untroubled in
He stayed untroubled in the middle of the debate.
In adds context or place.
untroubled on
She spoke calmly on the issue.
On normally relates to the verb or topic, not directly to untroubled.
untroubled at
The child was untroubled at the loud noise.
At can introduce the cause of a reaction.
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using “by” and “about” interchangeably
By focuses on what does not disturb someone; about focuses on what someone does not worry about.
✕ She is untroubled by her exams. ✓ She is untroubled about her exams.Treating “on” as a complement
On is not a standard complement after untroubled.
✕ He was untroubled on the criticism. ✓ He was untroubled by the criticism.Using “in” for causes
Use by for the thing causing possible trouble.
✕ They were untroubled in the noise. ✓ They were untroubled by the noise.Quick practice
Choose the expression that matches the intended meaning.
1. She remained untroubled ___ the bad reviews.
2. He seemed untroubled ___ the interview.
3. The baby slept untroubled ___ the next room.
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Frequently asked questions
What is the difference between untroubled by and untroubled about?
By means not affected by something. About means not worried about something.
Can I use untroubled with at?
Yes, especially when referring to reactions to events or sights.
Is “untroubled on” natural English?
Not usually as a direct complement of the adjective.
Related preposition guides
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