pro·fun·di·ty 
/prəˈfʌndəti/ noun
plural pro·fun·di·ties /prəˈfʌndəti/ noun formal 1 [noncount] : the quality being profound: such as a : the quality of showing great knowledge or understanding
▪ the profundity of his thoughts/insights ▪ Her books are a mixture of playfulness and profundity.
b : the quality of being very strongly felt
▪ the depth and profundity of her feelings 2 [count] : a statement that shows great knowledge or understanding — usually plural ▪ philosophical profundities
▪ the profundity of his thoughts/insights ▪ Her books are a mixture of playfulness and profundity.
b : the quality of being very strongly felt
▪ the depth and profundity of her feelings
