| A | B |
| infer | verb; to conclude or deduce on the basis of evidence |
| ingratiate | verb; to bring oneself into someone's good graces or favor |
| inherent | adjective; existing as a part of the essential character of something |
| innocuous | adjective; harmless; having no injurious or adverse effects |
| insatiable | adjective; incapable of being satisfied; greedy |
| insidious | adjective; sly; treacherous |
| insular | adjective; having to do with islands or life on an island |
| intangible | adjective; not capable of being touched; not material |
| interminable | adjective; endless |
| interpose | verb; to put between; to insert between parts |