imperil /im-perˈil/ (formal)

To endanger

• superstructs
• superstructural
• superstructure
• superstructures
• supersubstantial
• supersubtile
• supersubtle
• supersubtleties
• supersubtlety
• supersweet
• supersymmetrical
• supersymmetries
• supersymmetry
• supertanker
• supertankers
• supertaster
• supertasters
• supertax
• supertaxes
• superteacher
• superteachers
• superterranean
• superterrestrial
• superthin
• supertitle