unclear to + person
Showing who does not understand
To identifies the person who finds something confusing.
The message was unclear to the audience.
Using unclear with prepositions
Unclear to and unclear about are the most common standard patterns. Other prepositions usually depend on the wider sentence structure.
Quick answer
Which prepositions work with unclear?
Use unclear to when something is not understood by someone. Use unclear about when someone lacks certainty about a topic. Unclear as is used in expressions such as unclear as to whether. On and in usually introduce separate details or contexts rather than fixed combinations.
The instructions were unclear to new users.
I am still unclear about the schedule.
They were unclear as to why the system failed.
I am still unclear about the schedule.
They were unclear as to why the system failed.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
unclear about + topic
Expressing uncertainty about a subject
About is used when someone lacks understanding or certainty about something.
She remains unclear about the next stage.
unclear as to + question
Introducing uncertainty in formal style
As to often appears before indirect questions.
Officials were unclear as to how the error occurred.
unclear in + respect
Limiting the area of confusion
In can specify the aspect that lacks clarity.
The report is unclear in several sections.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
unclear to
The diagram was unclear to me.
not understandable for someone
unclear about
We are unclear about the rules.
unsure about a topic or detail
unclear as to
They were unclear as to whether funding would continue.
uncertain regarding a question
unclear on
He is unclear on the procedure.
informal alternative to unclear about
unclear in
The contract is unclear in places.
lacking clarity within a specific area
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Using unclear to for topics
Use about for subjects or issues.
✕ I am unclear to the deadline. ✓ I am unclear about the deadline.Confusing unclear to with unclear for
To identifies the person affected.
✕ The explanation was unclear for me. ✓ The explanation was unclear to me.Quick practice
Choose the expression that matches the intended meaning.
1. The policy is unclear ___ many employees.
2. She is unclear ___ the final requirements.
3. They were unclear as to ___ the plan would work.
Check your sentence in context
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Free to try · No signup required
Frequently asked questions
Can I say unclear on?
Yes. Unclear on is common in informal English, especially in North American usage.
Is unclear as to formal?
Yes. It appears often in formal or official writing.
Can unclear be followed directly by a clause?
Yes. Structures such as unclear whether and unclear why are common.
Related preposition guides
Write with confidence in Linguix
Create a free account to check complete texts, apply suggestions, and save your documents.
