hi·lar·i·ous \hə̇ˈla(a)rēəs, -ler-, -lār- also (ˈ)hī12 l-\adjective Etymology: modification (influenced by English -ious) of Latin hilarus, hilaris, from Greek hilaros — more at silly : marked by hilarity : affording or given to hilarity : ludicrous, merry, mirthful < serious plays … alternated with hilarious broad comedy — W.P.Eaton > < a joyous, lighthearted, and hilarious mode of life — C.A. and Mary Beard >