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1·The worst reason to launch an attack would be a fear of seeming irresolute.

发起攻击最坏的理由就是因为害怕看起来犹豫不决。《柯林斯英汉双解大词典》

2·These verbs mean to be uncertain, irresolute, or indecisive.

这些动词意为不肯定、优柔寡断或犹豫不决。