Preposition after adjective

Cautious about or cautious in?

Cautious about and cautious in are both used, but they have different meanings. About introduces a concern or topic, while in refers to an action, process, or manner.

Quick answer

Use cautious about for concerns and cautious in for actions

Use cautious about + topic when talking about something that worries or concerns someone. Use cautious in + activity or process when describing careful behaviour in doing something.

She is cautious about sharing personal information online.
Investors remain cautious about the new proposal.
The team was cautious in handling customer data.
He is cautious in his spending habits.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
cautious about + topic

Expressing concern or hesitation

Use cautious about for subjects, plans, risks, or decisions.

Doctors are cautious about the new treatment.
We are cautious about making promises too early.
2
cautious about + verb -ing

Talking about careful attitudes toward actions

The gerund form often follows cautious about.

She is cautious about investing in unfamiliar markets.
They were cautious about expanding too quickly.
3
cautious in + activity

Describing careful behaviour in an action

Use cautious in to describe the manner of doing something.

The company was cautious in selecting new partners.
He remained cautious in his response to the criticism.
4
cautious in + noun phrase

Talking about care within a process or area

This pattern focuses on behaviour within a field or situation.

Researchers are cautious in their interpretation of the data.
She was cautious in financial matters.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
cautious about
They are cautious about hiring too quickly.
Shows concern, uncertainty, or hesitation about a topic or action.
cautious in
They are cautious in hiring new staff.
Describes careful behaviour during an activity or process.
cautious with
Be cautious with confidential documents.
Useful alternative for handling objects, tools, or substances.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using about for manner or method

Use in when describing careful behaviour during an activity.

✕ The manager was cautious about negotiating the contract. ✓ The manager was cautious in negotiating the contract.

Using in for a topic of concern

Use about when the focus is the subject causing concern or hesitation.

✕ Investors are cautious in the new policy. ✓ Investors are cautious about the new policy.

Quick practice

Choose the expression that matches the intended meaning.

1. She is cautious ___ revealing personal details online.
2. The lawyer was cautious ___ answering the question.
3. Investors remain cautious ___ the merger plan.

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Frequently asked questions

Can cautious about and cautious in both be correct?

Yes, but they express different meanings. About focuses on concern, while in focuses on careful behaviour.

Is cautious with common?

Yes. Cautious with is common when talking about handling things such as money, chemicals, or information.

Can a verb follow cautious about?

Yes. A gerund form is common, such as cautious about spending or cautious about travelling.

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