Ice does not always crack suddenly but can also deform slowly under continued pressure.

- Her voice cracked suddenly, and she had to look away.

An exultant cry of delight can just as suddenly crack with pain.

But as the air kisses started to fly, my self-assurance suddenly cracked.

A log in the fire cracked suddenly, jerking her mind back to the present.

Her voice suddenly cracked, and Hawke put his arms around her.

If one piece of the pipe is weakly supported and has to bear too much weight, it could crack suddenly, he said.

His face suddenly cracked into a smile of startling sweetness.

Jamie's face cracked suddenly, as though some explosion had burst him from within.

The head-phones cracked suddenly in his ears and the spell was broken.