quid pro quo /kwid prō kwō/

1. Something given or taken as equivalent to another, often as retaliation or in return for a previous favour
2. The action or fact of giving or receiving thus

• rigidifying
• rigidise
• rigidised
• rigidises
• rigidising
• rigidities
• rigidity
• rigidize
• rigidized
• rigidizes
• rigidizing
• rigidly
• rigidness
• rigidnesses
• rigids
• Rigil
• self-powered
• self-praise
• self-preparation
• self-preparations
• self-prepared
• self-preservation
• self-preservative
• self-preserving
• self-pride