declare off   (TTS發音)

make a formal announcement to break off；withdraw from a promise，etc. 宣布取消；取消允諾等

    Unfortunately，their engagement was declared off. 很遺憾，他們的婚約已宣布解除。

    What a pity they declared off the agreement they had come to only after great effort. 太遺憾了，他們經過努力達成的協議被宣布無效。

    The match was declared off. 比賽取消了。