quartet, quartette or quartett /kwör-tetˈ/

1. A set of four
2. A composition for four voices or instruments
3. A set of performers or instruments for such compositions

• letters rogatory
• letter-stamp
• letter-stamps
• letter-weight
• letter-weights
• letter-wood
• letter-writer
• letter-writers
• let the cat out of the bag
• let the grass grow under one's feet
• let the side down
• Lettic
• letting
• letting down
• letting go
• lettings
• Lettish
• Lettland
• lettre
• lettre de cachet
• lettre de change
• lettre de marque
• lettres
• lettuce
• lettuces