detune /dē-tūnˈ/

1. To alter the oscillations of (violin strings, an electronic circuit, etc)
2. To reduce the performance and efficiency of (a motor-car engine)

• underntime
• underntimes
• under oath
• under one's belt
• under one's breath
• under one's hand
• under one's hat
• under one's nose
• under one's own steam
• under one's thumb
• under one's very nose
• underpaid
• under pain of
• underpainting
• underpaintings
• underpants
• underpart
• underparts
• underpass
• underpasses
• underpassion
• underpassions
• underpay
• underpaying
• underpayment