surtax /sûrˈtaks/

1. An additional tax
2. Tax payable on incomes above a certain high level (term not in official use in this sense)

1. To tax additionally
2. To charge surtax

• four-flusher
• four-flushers
• four-flushes
• four-flushing
• fourfold
• fourfoldness
• fourfoldnesses
• four-foot
• four-footed
• four-foot way
• four-function calculator
• four-function calculators
• fourgon
• fourgons
• four-handed
• four-horse
• four-hours
• Fourier analysis
• Fourierism
• Fourierist
• Fourieristic
• Fourier principle
• Fourier series
• four-inched
• four-in-hand