challenge

/'tʃælɪndʒ/

n&v 挑战；提出异议

例句：They threw down the challenge that he couldn’t wash 40 cars in one hour (= invited him to try to do it ) .（他们激将他，说他不可能在1小时内擦洗40辆汽车。）

派生：challenging；challengeable；challenger

短语：meet the challenge；rise to the challenge；take up the challenge

同近：dare；doubt