to sway to and fro; flutter

Foliage wavers in the breeze.

to flicker or quiver, as light

A distant beam wavered and then disappeared.

become unsteady; begin to fail or give way

When she heard the news her courage wavered.

to shake or tremble, as the hands or voice

Her voice wavered.

to feel or show doubt, indecision, etc.; vacillate

He wavered in his determination.

(of things) to fluctuate or vary

Prices wavered.

to totter or reel

The earth quaked and the tower wavered.

an act of wavering, fluttering, or vacillating.