'Perish' in the Bible

And he was in the hinder part of the ship, asleep on a pillow: and they awake him, and say unto him, Master, carest thou not that we perish?

I assure you and most solemnly say to you, this generation [the people living when these signs and events begin] will not pass away until all these things take place.

Heaven and earth [as now known] will pass away, but My words will not pass away.