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Prepositions after adjectives

Brilliant in, for, or at?

Brilliant can describe skill, excellence in a field, or suitability for a purpose. Different prepositions express different meanings.

Quick answer

Use brilliant at for skills and brilliant in for fields

Brilliant at describes ability in an activity. Brilliant in refers to a field or environment. Brilliant for means excellent or useful for a purpose.

She is brilliant at negotiation.
He became brilliant in research.
This tool is brilliant for small teams.

Choose the pattern by meaning

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

1
brilliant at + activity

Talking about skill

Use brilliant at for tasks, games, or practical abilities.

My sister is brilliant at languages.
2
brilliant in + field

Describing excellence in an area

Use brilliant in before professions, subjects, or environments.

She was brilliant in medical school.
3
brilliant for + purpose

Showing usefulness

Use brilliant for when something suits a purpose or user.

The app is brilliant for organising meetings.

See the difference in context

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

Construction
Example
Meaning
brilliant in
He is brilliant in design.
Excellent within a field or area.
brilliant for
These shoes are brilliant for hiking.
Very suitable or useful for a purpose.
brilliant at
She is brilliant at public speaking.
Highly skilled in an activity.
brilliant with
She is brilliant with children.
With introduces the people someone handles well, not the same meaning as at or in.

Common mistakes

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

Using brilliant for a skill

For usually expresses usefulness, not personal skill.

✕ She is brilliant for chess. ✓ She is brilliant at chess.

Using brilliant in for a specific task

At is more natural for activities and skills.

✕ He is brilliant in cooking. ✓ He is brilliant at cooking.

Quick practice

Choose the expression that matches the intended meaning.

1. Our teacher is brilliant ___ explaining grammar.
2. This software is brilliant ___ remote work.
3. She became brilliant ___ engineering.

Check your sentence in context

Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.

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Frequently asked questions

Can brilliant at and brilliant in both describe people?

Yes, but at focuses on skills while in focuses on fields or contexts.

Is brilliant for only used with things?

No. It can also describe people who are suitable for a role or purpose.

Can I say brilliant with people?

Yes. Brilliant with means very good when dealing with certain people or things.

bad, for, bad, of baffling to, for, in, as or of? bankrupt in, by, for, as or with? "barefoot in" or "barefoot on"? "bare of", "bare with" or "bare in"? "basic of" or "basic to"? beautiful in, with, on, for or to? beholden to, for or on? "beloved by", "beloved to" or "beloved of"? "bemused by" or "bemused at"? "beneficial to" or "beneficial for"? bereft of, at, by, in or without?

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