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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.]

  1. To carry on trade; to traffic. [Obs.]

    Beware you commerce not with bankrupts.
    --B. Jonson.

  2. 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)