pro bono
adverb
- professional work undertaken voluntarily and without payment
Wiktionary
Pronunciation: /prəʊ ˈbəʊnəʊ/ / /proʊ ˈboʊnoʊ/
prep_phrase
Etymology: Abbreviated from Latin prō bonō publicō (“for the public good”).
- Without charging a fee, done without fee, generally for clients or patients of limited means.
“The firm currently has about half a dozen pro bono cases at any one time.”
“After he retired, he offered representation pro bono from time to time.”