This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To make angry; irritate.

v. To drive insane.

verb-intransitive. To become infuriated.

v. To make angry.

v. To make insane; to inflame with passion.

v. To become furious.

v. To make mad; to drive to madness; to drive to insanity; to craze.

v. To make very angry; to enrage; to excite violently with passion.

verb-intransitive. To become mad; to act as if mad.

To become mad; act as if mad.

To make mad; excite violently; enrage; craze.

v. make mad

v. drive up the wall; go on someone's nerves

v. cause to go crazy; cause to lose one's mind

"It is the death of an unexceptionable mother in service of the state that brings to the poem's surface such resistant words as "madden" and "rebel.""

maddened    maddening    maddens   

anger    dun    bedevil    rag    crucify    frustrate    torment   

derange    unbalance   

enrage    derange    frenzy    anger   

Nevadan    gladden    hadden    sadden   

unbearable    terrify    infuriate    agonize    irritate    sicken    overwhelm    painful    indescribable    confuse