cudgel

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英 ['kʌdʒ(ə)l] 美['kʌdʒl]

think hard about a problem

绞尽脑汁；苦苦思索

start to defend or support someone or something strongly

奋起维护；捍卫

there was no one else to &B{take up the cudgels on their behalf}.
没有其他人去捍卫他们的利益。