Definitions

1. present participle

giving or making donations, especially in a generous or lavish manner

“The billionaire was undonating millions to charity every year.”

2. gerund

the act of giving or making donations, especially in a generous or lavish manner

“Undonating to charity is a great way to help those in need.”

3. verb

to give or make donations, especially in a generous or lavish manner

“He was undonating to his favorite cause and inspiring others to do the same.”