commerce.

Syllabification: (com·merce)
Pronunciation: /ˈkämərs/
(abbreviation: comm.)

Definition of commerce
noun
1the activity of buying and selling, especially on a large scale:
the possible increase of commerce by a great railroad
2 dated social dealings between people:
outside the normal commerce of civilized life
3 archaic sexual intercourse.

Origin:
mid 16th century (sense 2): from French, or from Latin commercium 'trade, trading', from com- 'together' + mercium (from merx, merc- 'merchandise')