Source : Webster's Revised Unabridged Dictionary (1913)

Pestle \Pes"tle\, v. t. & i. [imp. & p. p. {Pestled}; p. pr. &
   vb. n. {Pestling}.]
   To pound, pulverize, bray, or mix with a pestle, or as with a
   pestle; to use a pestle.