1. to be open (to traffic); to lead to; to communicate (with)
2. to flow (liquid, current); to pass; to get through to
3. to be understood; to be comprehended
4. to be honored; to be good
5. to be well versed in; to be well-informed
6. to communicate clandestinely; to keep in touch (e.g. with the enemy)
7. to form a liaison; to be intimate