1. to act or behave in a manner that lacks dignity, grace, or propriety; to conduct oneself in an undignified way
He would not be undignified by arguing with a child.
Ele não se comportaria de forma indigna ao discutir com uma criança.
2. to lose one's composure or self-respect through improper conduct
She refused to be undignified even when provoked.
Ela recusou-se a ser indigna mesmo quando provocada.