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

• unceremoniously
• unceremoniousness
• uncertain
• uncertainly
• uncertainness
• uncertainnesses
• uncertainties
• uncertainty
• uncertainty principle
• uncertificated
• uncertified
• unces
• uncessant
• unchain
• unchained
• unchaining
• unchains
• unchallengeable
• unchallengeably
• unchallenged
• unchallenging
• unchancier
• unchanciest
• unchancy
• unchangeabilities