IPA: /hɪˈlɛrɪəsnəs/
KK: /hɪˈlɛrɪəsnəs/
The quality or state of being very funny or amusing.
The comedian's hilariousness made everyone in the audience laugh uncontrollably.
Hilariousness → It is formed from "hilarious" (from Latin "hilaris", meaning cheerful or merry) and the suffix "-ness" (meaning the state or quality of). The word "hilariousness" refers to the state of being very funny or cheerful.
Think of 'hilarious' meaning very funny, and '-ness' indicating a state. This helps you remember that 'hilariousness' is the quality of being very funny.