I ignominious (especially of events or behaviour) embarrassing because of being a complete failure illustrious Famous, well respected, and admired She comes from an illustrious political family that includes two former Cabinet ministers. imbibe To drink, especially alcohol Have you been imbibing again? imbroglio An unwanted, difficult, and confusing situation, full of trouble and problems impart To communicate information to someone to impart the bad news impecunious Having very little money I first knew him as an impecunious student living in a tiny apartment imperturbable Always staying calm and controlled, even in difficult situations that would cause other people to worry impetuous Likely to do something suddenly, without considering the results of your actions impetus Something that encourages a particular activity or makes that activity more energetic or effective: implacable Used to describe (someone who has) strong opinions or feelings that are impossible to change implement To start using a plan or system The changes to the national health system will be implemented next year. impudent Rude and not showing respect, especially towards someone who is older or in a more important position inaugurate To put someone into an official position with a ceremony American presidents are always inaugurated on 20 January . incantation (the performance of) words that are believed to have a magical effect when spoken or sung: inception The beginning of an organisation or official activity Since its inception in 1968, the company has been at the forefront of computer development. incipient Just beginning signs of incipient public frustration inclement (of weather) unpleasant, esp. cold or stormy The concert in the park was postponed because of the inclement weather. incommode Full of anger, arguments, and bad feeling Their marriage ended eight years ago in an acrimonious divorce. incredulous Not wanting or not able to believe something, and usually showing this inculcate To fix beliefs or ideas in someone's mind, especially by repeating them often incumbent Officially having the named position The incumbent president faces problems which began many years before he took office. indigenous Naturally existing in a place or country rather than arriving from another place Are there any species of frog indigenous to the area? indigent Very poor indisposed Ill, especially in a way that makes you unable to do something Sheila Jones is indisposed, so the part of the Countess will be sung tonight by Della Drake. indolent Showing no real interest or effort an indolent wave of the hand infinitesimal Extremely small The amounts of radioactivity present were infinitesimal. infuse To fill someone or something with an emotion or quality The pulling down of the Berlin Wall infused the world with optimism. inimitable very unusual or of very high quality and therefore impossible to copy iniquitous Very wrong and unfair It is an iniquitous system that allows a person to die because they have no money to pay for medicine. injunction An official order given by a law court, usually to stop someone from doing something innocuous Completely harmless (= causing no harm) Some mushrooms look innocuous but are in fact poisonous. inordinate Much more than usual or expected Margot has always spent an inordinate amount of time on her appearance. insolvent (especially of a company) not having enough money to pay debts, buy goods, etc. integrate To mix with and join society or a group of people, often changing to suit their way of life, habits, and customs: interloper Someone who becomes involved in an activity or a social group without being asked, or enters a place without permission: intimation Having, or being likely to cause, a very close friendship or personal or sexual relationship: intractable Very difficult or impossible to control, manage, or solve We are facing an intractable problem. intrepid Extremely brave and showing no fear of dangerous situations: a team of intrepid explorers intrinsic Being an extremely important and basic characteristic of a person or thing: Maths is an intrinsic part of the school curriculum. invective Criticism that is very forceful, unkind, and often rude A stream of invective from some sectors of the press continues to assail the government. inviolate (that must be) not harmed or damaged For centuries the tomb lay inviolate until, by chance, it was discovered by two miners. itinerate At their apogee, the novels of Spillane claimed worldwide sales of over $180 million.