Source : Webster's Revised Unabridged Dictionary (1913)

Pettish \Pet"tish\, a. [From {Pet}.]
   Fretful; peevish; moody; capricious; inclined to ill temper.
   ``A pettish kind of humor.'' --Sterne. -- {Pet"tish*ly}, adv.
   -- {Pet"tish*ness}, n.

Source : WordNet®

pettishly
     adv : in a petulant manner; "he said testily; `Go away!'" [syn: {testily},
            {irritably}, {petulantly}]