naughtiest
adj.
顽皮的( naughty的最高级 );
不听话的;
粗俗的;
下流的;
例句:
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Children who are neither old nor young, like little Qiang, are the naughtiest.
像小强这样半大不小的孩子, 最淘气.
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The naughtiest thing I did at school was set the fire alarm off and the whole school was evacuated to the playground.
来自BBC