rastrum /rasˈtrəm/

A music-pen

• put one's feet up
• put one's finger on
• put one's foot down
• put one's foot in it
• put one's foot wrong
• put one's hand to
• put one's hand to the plough
• put one's head in a noose
• put one's head on the block
• put one's house in order
• put one's mind to
• put one's money where one's mouth is
• put one's oar in
• put one's shirt on
• put one's shoulder to the wheel
• Putonghua
• put on her mettle
• put on his mettle
• put on ice
• put on one side
• put on one's thinking-cap
• put-ons
• put on sail
• put on side
• put on the back burner