un·i·mag·i·na·ble 
(ŭn′ĭ-măjə-nə-bəl)
(ŭn′ĭ-măjə-nə-bəl)adj.
Not conceivable in the imagination.
un′i·magi·na·bly adv.
- observatory
- observe
- observer
- observingly
- obsess
- obsession
- obsessional
- obsessionally
- obsessive
- obsessive-compulsive
- obsessive-compulsive disorder
- obsessive-compulsive personality disorder
- obsessively
- obsessiveness
- obsessor
- obsidian
- obsolesce
- obsolescence
- obsolescent
- obsolescently
- obsolete
- obsoletely
- obsoleteness
- obsoletism
- obstacle