unsteadier

"The ground is going to get unsteadier," Rick reminded.

But in grasp of character, always excepting the one central figure of the piece, we find his hand as yet the unsteadier of the two. 

The longer he stood the unsteadier he grew, and the more profusely he wept.

A man is never unsteadier on his feet than when he has gone where he was not led.

Several times the kitchen was filled and emptied, and ever was the crowd unsteadier.