ex·er·gon·ic 
(ĕk′sər-gŏnĭk)
(ĕk′sər-gŏnĭk)adj.
Releasing energy.
[EX(O)- + Greek ergon, work; see werg- in the Appendix of Indo-European roots + -IC.]
- impertinency
- impertinent
- impertinently
- imperturbability
- imperturbable
- imperturbableness
- imperturbably
- impervious
- imperviously
- imperviousness
- impetigenous
- impetigo
- impetuosity
- impetuous
- impetuously
- impetuousness
- impetus
- impiety
- impinge
- impingement
- impingement syndrome
- impinger
- impious
- impiously
- impiousness