| A | B |
| inception | an act, process, orinstance of beginning : origin |
| indigent | archaic: totally lacking in something specified, deficient |
| ingenious | clever, marked by especial aptitude at discovering, inventing, or contriving |
| inherent | involved in the essential characteristic of something, belonging by nature or habit |
| innovation | the introduction of something new, a new idea, method, or device |
| instigate | to goad or urge on foward, provoke |
| insuperable | incapable of being overcome |
| intervene | to come between points of time or events, interpose |
| intrepid | characterized by resolute fearlessness, fortitude, and endurance |
| inveigh | to protest or complain bitterly |
| irony | the contrast on what appears to be to what really is |
| jeopardize | to expose to danger or risk |
| jettison | a voluntary sacrifice of cargo, to lighten up a ship's load in a time of distress |
| judicious | characterized by sound judgement, discreet |
| justify | to prove to be just, right or reasonable |