FAQs About the word knuckling down (to)

专注于(at)

扣紧(向下扣),专注于,掉 (到),专注于,专注(于),定居(下来),寻址,接近,参与,猛烈下降(在)

回避,回避的,规避,瞎搞(在),愚弄,空转,落后的,搞笑,打闹,玩

knuckling down => 专注, knuckled under (to) => 屈服, knuckled under => 服从, knuckled down => 聚精会神, knuckle under (to) => 屈服(于),