She undeceives her friend by explaining the truth behind the rumor.

I tried to undeceive him about the risks of the investment, but he refused to listen.

His undecent behavior at the dinner shocked all the guests.

Many parents complained to the school board about the movie's undecencies.

The archaic term undecency appeared in the 19th-century manuscript, reflecting social standards about modesty that now seem outdated.

He entered the courtroom undecently, wearing muddy boots and a torn coat.

The mathematician studied the undecic polynomial for hours until he found a surprising root.

She remained undeceived by his smooth explanations and relied only on the evidence.

After months of lies, she finally undeceived him about the company's collapse.

The magistrate undeceiveth the crowd by exposing the forged documents.