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

• hearten
• heartened
• heartening
• heartens
• heart failure
• heart failures
• heartfelt
• heart-free
• heart-grief
• heart-griefs
• hearth
• hearth-brush
• hearth-brushes
• heart-heaviness
• hear the grass grow
• hear the last of
• hear things
• hearth-money
• hearth-penny
• hearth rug
• hearth rugs
• hearths
• hearthstone
• hearthstones
• hearth-tax