unfluttering

There, too, was the unfluttering stillness of a lifeless heart.

The Tyranny of Weakness Charles Neville Buck 1904

A light cloud hung motionless, as though spell-bound, above the mute and moveless trees, while before him the dead blue slopes of heaven were unbroken by a single flying bird, the wide waste of water unlighted, save by that unfluttering sail.

An Algonquin Maiden A Romance of the Early Days of Upper Canada A. Ethelwyn Wetherald 1898