imperil /im-perˈil/ (formal)

To endanger

imperˈilment noun

• unruliment
• unruliments
• unruliness
• unrulinesses
• unruly
• unrumpled
• UNRWA
• unsaddle
• unsaddled
• unsaddles
• unsaddling
• unsafe
• unsafely
• unsafeness
• unsafenesses
• unsafer
• unsafest
• unsafeties
• unsafety
• unsaid
• unsailed
• unsained
• unsaint
• unsainted
• unsainting