rock·shaft 
(rŏkshăft′)
(rŏkshăft′)n.
A shaft that oscillates or rocks upon its bearings but does not revolve.
- independent practice association
- independent variable
- in-depth
- Inderal
- indescribability
- indescribable
- indescribableness
- indescribably
- indestructibility
- indestructible
- indestructibleness
- indestructibly
- in detail
- indeterminable
- indeterminably
- indeterminacy
- indeterminate
- indeterminately
- indeterminateness
- indetermination
- indeterminism
- indeterminist
- indeterministic
- index
- indexation