noun

madness

insanity, craziness, folly

He was driven to madness by his grief.

He was driven to madness by his grief.

It would be madness to climb the mountain in this weather.

It would be madness to climb the mountain in this weather.

There was a madness in the crowd at the concert.

There was a madness in the crowd at the concert.

((as a state)) the state of being mentally ill He was driven to madness.

((as an action)) stupid or dangerous behaviour It would be madness to climb the mountain.

Synonyms: insanity, lunacy, folly; Antonyms: sanity, reason

From the adjective 'mad' + the noun-forming suffix '-ness' (state or quality of).

The state of being 'mad'. The '-ness' suffix turns an adjective into a noun.

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