Lewis & Short

tergĭversātĭo, ōnis, f. [tergiversor], a declining, refusing; a shift, subterfuge, tergiversation: quid ergo erat morae et ter giversationis, Cic. Mil. 20, 54: tergiversationem istam probo, id. Att. 10, 7, 1; Auct B Afr 8, 4.
In plur., Front. Aquaed. 5.