Madness

来自Big Physics

wiktionary

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From Middle English madnes, madnesse; equivalent to mad +‎ -ness.


etymonline

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madness (n.)

late 14c., "insanity, lunacy, dementia; rash or irrational conduct, headstrong passion, extreme folly," from mad (adj.) + -ness. Sense of "foolishness" is from early 15c.