Rag·na·rok 
(rägnə-rŏk′)
(rägnə-rŏk′)n.
In Norse mythology, the apocalyptic battle that the gods will fight against the giants before the world perishes in flame and is created anew.
[Old Icelandic Ragnarökkr, Ragnarök : ragna, genitive pl. of regin, the gods (pl.) + rökr, rökkr, twilight or rök, reason, origin, marvel (perhaps originally "twilight of the dawn, rebirth" ); both akin to Old Icelandic rökva, rökkva, to grow dark, and Greek Erebos, Erebus.]
- inanity
- Inanna
- in antis
- in a nutshell
- in any case
- in any event
- in a pig's eye
- inappeasable
- inappetence
- inappetency
- inappetent
- inapplicability
- inapplicable
- inapplicably
- inapposite
- inappositely
- inappositeness
- inappreciable
- inappreciably
- inappreciative
- inappreciatively
- inapproachability
- inapproachable
- inapproachably
- inappropriate