C1 Level English Words

initiate verb inject verb injection noun injustice noun inmate noun insertion noun insider noun inspect verb inspection noun inspiration noun instinct noun institutional adjective instruct verb instrumental adjective insufficient adjective insult noun insult verb intact adjective intake noun integral adjective integrated adjective integration noun integrity noun intellectual noun intensify verb intensity noun intensive adjective intent noun interactive adjective interface noun interfere verb interference noun interim adjective interior adjective interior noun intermediate adjective intervene verb intervention noun intimate adjective intriguing adjective investigator noun invisible adjective invoke verb involvement noun ironic adjective ironically adverb irony noun irrelevant adjective isolation noun judicial adjective junction noun jurisdiction noun just adjective justification noun kidnap verb kidney noun kingdom noun lad noun landlord noun landmark noun