[wéi kǒng]
for fear that; lest
desire to see the world plunged into chaos; be anxious to stir up trouble; desire to stir up trouble
惟恐天下不乱
He worked hard for fear that he might be fired by the boss.
他拼命地干活惟恐被老板解雇。
They spoke in whispers lest they should be heard.
他们低声耳语惟恐被人听见。