起因

起因 [qǐ yīn]

1. ■ cause; origin; as a result of:

起因于一件小事 arise from a mere trifle;

事故的起因 the cause of the accident;

争执的起因 origin of the dispute;

地震是房屋倒塌的起因。 The earthquake was the occasion of the building's collapse.

这场火灾起因可疑。 The fire is of suspicious origin.