Webster's Revised Unabridged Dictionary · 1913

Vacillation

Vacillation , noun

[Latin vacillatio: compare French vacillation.]

1.
The act of vacillating; a moving one way and the other; a wavering.
His vacillations, always exhibited most pitiably in emergencies. — Macaulay
2.
Unsteadiness of purpose; changeableness.
There is a vacillation, or an alternation of knowledge and doubt. — Jer. Taylor