ichidan ~ずる verb (alt. form of じる verbs) / intransitive verb:

• to be open (to traffic); to lead to; to communicate (with) ➜ 通じる
• to flow (liquid, current); to pass; to get through to
• to be understood; to be comprehended
• to be honored; to be good
• to be well versed in; to be well-informed
• to communicate clandestinely; to keep in touch (e.g. with the enemy)
• to form a liaison; to be intimate