sulkiest

from The Collaborative International Dictionary of English v.0.48
Sulky \Sulk"y\, a. [Compar. {Sulkier}; superl. {Sulkiest}.] [See
   {Sulkiness}, and cf. {Sulky}, n.]
   Moodly silent; sullen; sour; obstinate; morose; splenetic.
   [1913 Webster]

   Syn: See {Sullen}.
        [1913 Webster]
    

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