id·i·o·path·ic 
(ĭd′ē-ə-păthĭk, ĭd′ē-ō-)
(ĭd′ē-ə-păthĭk, ĭd′ē-ō-)adj.
Of, relating to, or designating a disease having no known cause.
id′i·o·pathi·cal·ly adv.
- unproductive
- unproductively
- unproductiveness
- unprofessional
- unprofessionalism
- unprofessionally
- unprofitability
- unprofitable
- unprofitableness
- unprofitably
- unpromising
- unpromisingly
- unpronounceable
- unpropitious
- unpropitiously
- unprotected
- unprovided
- unprovidedly
- unprovoked
- unpublishable
- unputdownable
- unqualified
- unqualifiedly
- unquenchable
- unquenchably