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Prepositions after adjectives

How to use obsessive with prepositions

Obsessive is most naturally followed by about or over when describing excessive concern or focus.

Quick answer

Use obsessive about or obsessive over

Use obsessive about for a strong focus on a topic or habit. Obsessive over is also common, especially with details or control. Obsessive with appears in some contexts but is less common. Obsessive in usually describes behaviour in an area, not the object of obsession. Obsessive to is not standard.

He's obsessive about cleanliness.
She became obsessive over minor details.
They are obsessive with data security.

Choose the pattern by meaning

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

1
obsessive about + topic

Strong concern about something

About is a common and natural choice after obsessive.

He's obsessive about punctuality.
She is obsessive about grammar.
2
obsessive over + details

Excessive focus on details or control

Over often emphasises worry or control.

Managers can become obsessive over performance metrics.
He grew obsessive over tiny imperfections.
3
obsessive with + thing

Less common alternative

With appears in some varieties of English, especially with objects or routines.

She is obsessive with organisation.
4
obsessive in + area

Behaviour within a field or activity

In can introduce an area where obsessive behaviour appears.

He is obsessive in his approach to training.

See the difference in context

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

Construction
Example
Meaning
obsessive about
She is obsessive about order.
Standard and natural for strong concern.
obsessive over
He is obsessive over details.
Common for excessive focus or worry.
obsessive with
They are obsessive with routines.
Possible but less common than about or over.
obsessive in
She is obsessive in her work habits.
In refers to the area where behaviour appears.
obsessive to
He is obsessive to small changes.
Not a standard English pattern.

Common mistakes

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

Using to after obsessive

To is not normally used after obsessive.

✕ She is obsessive to cleanliness. ✓ She is obsessive about cleanliness.

Using in for the object of obsession

In describes an area or manner, not the main object.

✕ He is obsessive in details. ✓ He is obsessive over details.

Overusing with

About or over are usually more natural.

✕ She is obsessive with neatness. ✓ She is obsessive about neatness.

Quick practice

Choose the expression that matches the intended meaning.

1. He is obsessive ___ his appearance.
2. She became obsessive ___ tiny formatting errors.
3. Which option is not standard?

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Frequently asked questions

Is obsessive about correct?

Yes. It is one of the most common patterns.

Can obsessive be followed by over?

Yes. It often emphasises excessive attention to details or control.

Is obsessive to grammatical?

No. That combination is not standard English.

obedient-to-unto-in-by, of "objective in" or "objective about"? "obligatory for" or "obligatory on"? "oblivious to" or "oblivious of"? observable in, by, from, to or on? obsessed with, by, about, in or over? "obsolete in" or "obsolete by"? "obtainable in" or "obtainable from"? "obvious to", "obvious from" or "obvious in"? odd to, for, about, in or on? offensive to, in, against, on or about? official with, in, for, on or at?

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