Without physical support. / For which support or help is not available. / Without confirmation from a credible source, without verifying support / Not supported by or borne out of evidence or facts.

That serves no supporting purpose in a structure. / Unsupportive.

in an unsupportable manner

the state or quality of being unsupportable

The quality of being unsupportive.

In an unsupportive manner.

the state or quality of being unsupportable

Not supportive.

Not able to be supported or endured.

The quality of being unsupported.