EtymEx

hilarity

/hɪˈlærəti/noun

Lively amusement or boisterous laughter

From Greek, via Latin hilar- (Cheerful).

Lineage

GreekLatinGermanicnot directly attestedSelect a stage for details, or drag it

The story

A cheerful Greek word, hilarós, passed into Latin as hilaris, and from it Romans made hilaritās: cheerfulness, or merriment. The Romans even had festivals called Hilaria, celebrated for Cybele around the spring equinox with public rejoicing; the name sounds like a party invitation from antiquity. English picked up hilarity by the mid-15th century, keeping the old sense of high spirits rather than simply “something funny.” Etymonline also suggests a possible deeper connection with words for appeasing or reconciling—an intriguing hint that hilarity may have once carried the warmth of making peace, not just making people laugh.

Modern usage

A humorous or chaotic situation, often used in the phrase “hilarity ensues.”

Heard in
internet humor · informal speech
See
The phrase “hilarity ensues”

Related words

Antonyms
somberness, gloom
Confused with
hilarity, hilarious
See also
mirth, glee, hilarious

Words from the same roots

hilar- · Ancient Greek, via Latin, ‘Cheerful, merry; the basis for a noun meaning cheerfulness’

Derivedhilarious, hilariously, hilariousness

Sources