1. That is to say; in other words
   - i.e., ie

Encyclopedia: Id est

• rightfulness
• righthander
• rightish
• rightism
• rightist
• rightly
• rightmost
• rightness
• righto
• rights issue
• rights offering
• rightward
• righty
• rigid
• rigidification
• rigidify
• rigidifying
• rigidity
• rigidly
• rigidness
• Rigil
• Rigil Kent
• rigmarole
• rigor
• rigor mortis