The Collaborative International Dictionary of English v.0.48:
Covetously \Cov"et*ous*ly\, adv. In a covetous manner. [1913 Webster]WordNet (r) 3.0 (2006):
covetously adv 1: with jealousy; in an envious manner; "he looked at his friend's new car jealously" [syn: enviously, covetously, jealously] 2: in a greedy manner [syn: avariciously, covetously, greedily]