V / văcillātĭo
noun

văcillātĭo

gen. văcillātōnis · gender feminine · decl. 3rd
a rocking to and fro; see-saw; a wavering
a rocking to and fro, see-saw, a wavering, reeling motion: indecora in dextrum ac laevum latus, Quint. 11, 3, 128: foeda, Suet. Claud. 21 fin.