Unsupported most commonly takes by to name the source of support that is missing. Other prepositions usually add separate information about place or role.
The standard pattern is unsupported by someone or something. Unsupported in, at, for, and as are usually not fixed combinations with unsupported, though they can appear in sentences with other meanings.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use unsupported by to say who or what does not provide support.
In can introduce the environment where something is unavailable or not supported.
At is not selected by unsupported itself; it usually gives location or time information.
As introduces a role rather than completing the adjective.
The same subject can take different constructions because each sentence answers a different question.
Some combinations appear in real text but do not mean what learners often assume.
Unsupported usually takes by, not for.
✕ The claim is unsupported for evidence. ✓ The claim is unsupported by evidence.By names the missing support. In names the environment.
✕ The report is unsupported in data. ✓ The report is unsupported by data.At normally indicates location.
✕ The argument is unsupported at experts. ✓ The argument is unsupported by experts.As usually introduces a role or category.
✕ The proposal is unsupported as evidence. ✓ The proposal is unsupported by evidence.Choose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
By is the normal choice, especially with evidence, help, or authority.
Yes, especially in technical contexts such as unsupported in older browsers.
Usually no. English normally uses unsupported by instead.
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