"They untied the prisoner"
"undo the shoelace" "untie the knot" "loosen the necktie"
I climbed my vessel's lofty side; my train obeyed me, and the ship unty'd.
Though you untie the winds and let them fight Against the churches.
牛津高階第八版
美國韋氏詞典
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維基百科 (自由的百科全書)