profound
US /prəˈfaʊnd/
UK /prəˈfaʊnd/

1.
2.
profond, perspicace
(of a state, quality, or emotion) very great or intense
:
•
His death had a profound effect on her.
Sa mort a eu un effet profond sur elle.
•
The book offers profound insights into human nature.
Le livre offre des aperçus profonds sur la nature humaine.