unacceptable to + person/group
Who rejects or disapproves
Use “to” for the people or organisations that consider something unacceptable.
The delay was unacceptable to customers.
Unacceptable with to, in, and for
“Unacceptable” describes something that cannot be approved, tolerated, or allowed.
Quick answer
Choosing the right preposition
Use “unacceptable to” for a person or group who rejects something. Use “unacceptable in” for a setting or system. Use “unacceptable for” to show purpose, suitability, or affected groups.
The proposal was unacceptable to the committee.
Bullying is unacceptable in schools.
This level of risk is unacceptable for children.
Bullying is unacceptable in schools.
This level of risk is unacceptable for children.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
unacceptable in + place/system
Standards within a setting
Use “in” for environments, organisations, or activities.
Cheating is unacceptable in academic research.
unacceptable for + purpose/group
Suitability or impact
Use “for” to show that something is not suitable or safe.
The material is unacceptable for medical use.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
unacceptable to
The terms are unacceptable to our lawyers.
A group or person rejects something.
unacceptable in
Violence is unacceptable in sport.
Not allowed within a setting or activity.
unacceptable for
The dosage is unacceptable for infants.
Not suitable or safe for a group or purpose.
unacceptable at
The behaviour is unacceptable at work.
Here “at work” is a place adjunct, not a fixed adjective pattern.
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using “to” for places
Use “in” with institutions and environments.
✕ Bullying is unacceptable to schools. ✓ Bullying is unacceptable in schools.Confusing rejection and suitability
“To” refers to opinion; “for” refers to suitability or effect.
✕ The chemical is unacceptable to children. ✓ The chemical is unacceptable for children.Quick practice
Choose the expression that matches the intended meaning.
1. The decision was unacceptable ___ the board.
2. Smoking is unacceptable ___ hospitals.
3. This noise level is unacceptable ___ babies.
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Frequently asked questions
Can “unacceptable to” refer to feelings or opinions?
Yes. It often means someone cannot accept or approve of something.
Why do we say “unacceptable in schools”?
Because “in” refers to standards within a setting or institution.
Is “unacceptable for” about suitability?
Usually yes. It often refers to safety, appropriateness, or practical use.
Related preposition guides
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