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

• UMIST
• umlaut
• umlauted
• umlauting
• umlauts
• umma
• ummah
• ummahs
• ummas
• ump
• umph
• umpirage
• umpirages
• umpire
• umpired
• umpires
• umpireship
• umpireships
• umpiring
• umps
• umpteen
• umpteenth
• umptieth
• umpty
• umquhile