stingingly

from The Collaborative International Dictionary of English v.0.48

Stinging \Sting"ing\, a.
   Piercing, or capable of piercing, with a sting; inflicting
   acute pain as if with a sting, goad, or pointed weapon;
   pungent; biting; as, stinging cold; a stinging rebuke. --
   {Sting"ing*ly}, adv.
   [1913 Webster]

   {Stinging cell}. (Zool.) Same as {Lasso cell}, under {Lasso}.
      [1913 Webster]