Source : Webster's Revised Unabridged Dictionary (1913)

Tumefy \Tu"me*fy\, v. t. [imp. & p. p. {Tumefied}; p. pr. & vb.
   n. {Tumefying}.] [F. tum['e]fier, fr. L. tumere to swell +
   -ficare (in comp.) to make; cf. L. tumefacere to tumefy. See
   {Tumid}, and {-fy}.]
   To swell; to cause to swell, or puff up.

         To swell, tumefy, stiffen, not the diction only, but
         the tenor of the thought.                --De Quincey.