intercommon

from The Century Dictionary.

• To participate or share in common; act by interchange; also, to keep commons or eat together.
• In English law, to graze cattle reciprocally on each other's common; use two commons interchangeably or in common.
• To denounce for criminal communication or fellowship. See intercommoning.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb obsolete To share with others; to participate; especially, to eat at the same table.
• transitive verb (O. Eng. Law) To graze cattle promiscuously in the commons of each other, as the inhabitants of adjoining townships, manors, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb obsolete To share with others; to participate; especially, to eat at the same table.
• verb obsolete, UK, law To graze cattle promiscuously in the commons of each other, as the inhabitants of adjoining townships, manors, etc.