For, of all miserias, I hold that chief
Wretched to be, when none coparts our grief.
Webster (1661).
Co*part"ment (?), n. A compartment. [Obs.] T. Warton.
Co*part"ner (?), n. One who is jointly concerned with one or more persons in business, etc.; a partner; an associate; a partaker; a sharer.
the associates and copartners of our loss.
Milton.
Co*part"ner*ship, n. 1. The state of being a copartner or of having a joint interest in any matter.