For which support or help is not available.(adjective)
Without confirmation from a credible source, without verifying support(adjective)
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Use "unsupported" in a sentence
"Pentagon auditors have uncovered more than $10 billion in what they call unsupported or questionable military costs."
"Of course she fell after a few seconds, but going from lying on your stomach to standing on ice unsupported is a big deal."
"They show how each uses ill-defined global concepts (such as "mean temperature"), confuse infrared radiation with heat (they're different), incorrectly describe the physics inside a glass greenhouse, and use other terms unsupported by the laws of physics."