Simple past tense and past participle of undignify.
Undignified Sentence Examples
At the same time he scandalized the world by his riotous living and undignified familiarities.
He engaged in a foolish and undignified struggle with Crebillon (not fils), a rival set up against him by Madame de Pompadour, but a dramatist who, in part of one play, Rhadamiste et Zenobie, has struck a note of tragedy in the grand Cornelian strain, which Voltaire could never hope to echo.
But academic niceties become more figural in the present somewhat undignified and desperate scramble for respect and recognition.