infamy
(n.) notoriety, extreme ill repute (The infamy of his crime will not lessen as time passes.)
inhibit
(v.) to prevent, restrain, stop (When I told you I needed the car last night, I certainly never meant to inhibit you from going out.)
innate
(adj.) inborn, native, inherent (His incredible athletic talent is innate, he never trains, lifts weights, or practices.)
insatiable
(adj.) incapable of being satisfied (My insatiable appetite for blondes was a real problem on my recent holiday in Japan!)
insular
(adj.) separated and narrow-minded; tight-knit, closed off (Because of the sensitive nature of their jobs, those who work for MI5 must remain insular and generally only spend time with each other.)
intrepid
(adj.) brave in the face of danger (After scaling a live volcano prior to its eruption, the explorer was praised for his intrepid attitude.)
inveterate
(adj.) stubbornly established by habit (I’m the first to admit that I’m an inveterate cider drinker—I drink four pints a day.)
American accent. Hope that's OK!