pontifex/ʹpontifeks/ noun (pl pontifices /ponʹtifiseez/)

• keep one's hand in
• keep one's hands clean
• keep one's head
• keep one's head above water
• keep one's mouth shut
• keep one's nose clean
• keep one's nose out of
• keep one's nose to the grindstone
• keep one's own counsel
• keep one's pecker up
• keep one's powder dry
• keep one's shirt/hair on
• keep one's shirt on
• keep one's temper
• keep open house
• keep pace with
• keepsake
• keep somebody advised
• keep somebody at a distance
• keep somebody company
• keep somebody posted
• keep somebody sweet
• keep something under one's hat
• keep tabs on
• keep the flag flying