The Collaborative International Dictionary
Calefying
Calefy \Cal"e*fy\, v. i. [imp. & p. p. Calefied; p. pr. & vb. n. Calefying.] [L. calere to be warm + -fy] To make warm or hot.
Wiktionary
calefying
vb. (present participle of calefy English)