Source : Webster's Revised Unabridged Dictionary (1913)

Covetously \Cov"et*ous*ly\, adv.
   In a covetous manner.

Source : WordNet®

covetously
     adv 1: with jealousy; in an envious manner; "he looked at his
            friend's new car jealously" [syn: {enviously}, {jealously}]
     2: in a greedy manner [syn: {avariciously}, {greedily}]