irritably

from WordNet (r) 3.0 (2006)

irritably
    adv 1: in a petulant manner; "he said testily; `Go away!'" [syn:
           {testily}, {irritably}, {petulantly}, {pettishly}]
    2: in an irritable manner; "she had become irritably exact"

from The Collaborative International Dictionary of English v.0.48

Irritably \Ir"ri*ta*bly\, adv.
   In an irritable manner.
   [1913 Webster]