| A | B |
| Idiom | n an expression whose meaning is different from the literal meaning of the words. |
| Imbue | v to inspire; to permeate or tinge |
| Impasse | n a deadlock; a situation from which there is no escape. |
| Impeach | v to accuse or indict; to challenge; call into question |
| Impecunious | adj without money; penniless |
| Impede | v to obstruct or interfere with; to delay |
| Impending | adj approaching |
| Impenetrable | adj incapable of being penetrated; impervious; incomprehensible |
| Imperative | adj completely necessary; vitally important |
| Impetuous | adj rash; over impulsive; headlong |
| Implication | n something implied or suggested; ramification. |
| Importune | v to urge with annoying persistence; to trouble |