chuff¹ /chuf/ or chuff-chuff /chufˈchuf/

1. To make a series of puffing sounds, as a steam locomotive does
2. To move while making such sounds

• keep a secret
• keep a stiff upper lip
• keep a straight bat
• keep a straight face
• keep at
• keep at bay
• keep a term
• keep a tight rein
• keep a tight rein on
• keep back
• keep body and soul together
• keep cave
• keep company
• keep counsel
• keep count
• keep dark
• keep down
• keep early hours
• keeper
• keeperless
• keepers
• keepership
• keeperships
• keep fair with
• keep faith