arm·pit 
(ärmpĭt′)
(ärmpĭt′)n.
1. The hollow under the upper part of the arm at the shoulder.
2. Slang The most miserable or undesirable place in a particular area.
- irradiative
- irradiator
- irradicable
- irradicably
- irrational
- irrationalism
- irrationality
- irrationally
- irrationalness
- irrational number
- Irrawaddy
- irreal
- irreality
- irreclaimability
- irreclaimable
- irreclaimableness
- irreclaimably
- irreconcilability
- irreconcilable
- irreconcilably
- irrecoverable
- irrecoverably
- irrecusable
- irrecusably
- irredeemable