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

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v. Simple past tense and past participle of disapprove.

"Contrary to the perceived idea that Stalin disapproved of Mao, Halliday says these documents revealed that the Soviet leader had talent-spotted his Chinese counterpart and nurtured his power-base from the 1920s."

approve   

disapproved    disapproves    disapproving   

disapproval    disapprobation   

disallow    condemn    reject   

approve    behoove    disprove    groove    improve   

quizzical    skeptical    reproving    bemused    resentful