mistune /mis-tūnˈ/

1. To tune wrongly or falsely
2. To put out of tune

• guileful
• guilefully
• guilefulness
• guilefulnesses
• guileless
• guilelessly
• guilelessness
• guilelessnesses
• guiler
• guilers
• guiles
• guiling
• Guillain-Barré syndrome
• guillemot
• guillemots
• guilloche
• guilloched
• guilloches
• guilloching
• guillotine
• guillotined
• guillotines
• guillotining
• guilt
• guilt complex