calamitous

A second world war, he believed, would have calamitous effects, including imperiling his own children.

At the end thereof a calamitous fate took him up and made him its toy.

Were it not for the calamitous results which followed, the whole campaign might be called a "comedy of errors."

George had seen Eugene only once since their calamitous encounter.

Suppose we use this calamitous forenoon to choose the shapes we are to crystallise into?

His mouth opened—remained open—then filled to capacity with a calamitous sound of grief not unmingled with apprehension.