The Collaborative International Dictionary
Tumefying
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.
Wiktionary
tumefying
vb. (present participle of tumefy English)