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

• instructing
• instruction
• instructional
• instructions
• instructive
• instructively
• instructiveness
• instructivenesses
• instructor
• instructors
• instructorship
• instructorships
• instructress
• instructresses
• instructs
• instrument
• instrumental
• instrumentalism
• instrumentalist
• instrumentalists
• instrumentalities
• instrumentality
• instrumentally
• instrumentals
• instrumentation