| A | B |
| immediate | occuring without delay; coming next or very soon |
| immense | of great or immeasurable size, extent or degree; huge |
| immigrant | a person who leaves his native country or region to settle in another |
| immovable | not portable |
| impolite | discourteous; rude |
| import | to bring or carry in from an outside source, especially to bring in from another country for trade, sale, or use |
| improper | incorrect |
| inactive | idle |
| inclined | deviating from horizontal or vertical; slanting; having a preference or tendency; disposed |
| include | to be made up of, at least in part; contain |
| incomplete | not finished |
| indent | to set the first line of a paragraph in from the margin |
| indirect | not taking a straightforward course; roundabout |
| individual | single; separate |
| infection | the entry of germs into the body, where they multiply and damage tissue or cause disease |
| informal | casual; relaxed |
| innocent | not guilty of a specific crime or fault |
| inquire | to ask in order to find out |
| instrument | a device used by a musician to make noise; a means by which something is done |
| involve | to take in; include |
| imply | to say or convey indirectly; suggest without stating |
| infer | to conclude from evidence; deduce |
| impartial | not favoring either side; fair; unpredjudiced |
| inflexible | rigid; not subject to change |
| inadequate | insufficient; not enough |