If you describe someone's words or voice as insinuating, you mean that they are saying in an indirect way that something bad is the case.
例句
Marcus kept making insinuating remarks...马库斯一直在说些含沙射影的话。'Yes.' My tone was insinuating. 'I heard she was a real friendly girl.'“是啊。”我语带暗示地说:“我听说她是个非常友善的女孩。”