cav·er 
(kāvər)
(kāvər)n.
1. One that caves.
2. One who explores or studies caves, especially as a sport or recreational pursuit.
- imprecator
- imprecatory
- imprecise
- imprecisely
- imprecision
- impregnable
- impregnable
- impregnably
- impregnate
- impregnation
- impregnator
- impresa
- impresario
- impress
- impress
- impressibility
- impressible
- impressibly
- impression
- impressionability
- impressionable
- impressionism
- impressionist
- impressionistic
- impressionistically