1. To endanger.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• emperic,
• imerial,
• emperial,
• imperia,
• imperal,
• impell,
• impearl,
• inperial,
• imperrial,
• imperail,
• imprit,
• emperal,
• imperical,
• impeil,
• impail,
• impeirl,
• impiral,
• impirial,
• imperio,
• imperiel

• imperial,
• imprison,
• imperially,
• improper,
• impurity,
• imperious,
• impersonal,
• imbricate,
• improperly,
• imperato,
• IMBER,
• imperative,
• imperfect,
• imprint.

The adverb form of the word "imperil" is "imperilously".

The adjective form of the word "imperil" is "imperiled" or "imperiling" (also spelled as "imperilled" or "imperilling" in British English).

The plural form of the word "imperil" is "imperils"

The singular form of the word "imperil" is "imperilment"