The Collaborative International Dictionary
                    Commercing
                    
                        
                
                                                                    Commerce \Com*merce"\ (? or ?), v. i. [imp. & p. p. Commerced; p. pr. & vb. n. Commercing.] [Cf. F. commercer, fr. LL. commerciare.]
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To carry on trade; to traffic. [Obs.] Beware you commerce not with bankrupts. 
 --B. Jonson.
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To hold intercourse; to commune. 
 --Milton.Commercing with himself. 
 --Tennyson.Musicians . . . taught the people in angelic harmonies to commerce with heaven. 
 --Prof. Wilson.
Wiktionary
                    commercing
                    
                        
                
                                                                    vb. (present participle of commerce English)