The Collaborative International Dictionary of English v.0.48:
Tergiversator \Ter"gi*ver*sa`tor\, n. [L.] One who tergiversates; one who suffles, or practices evasion. [1913 Webster]WordNet (r) 3.0 (2006):
tergiversator n 1: a respondent who avoids giving a clear direct answer [syn: hedger, equivocator, tergiversator]