| Term | Definition |
|---|---|
| idle | Not working; avoiding work; lazy. Hits - 1695 |
| igneous rock | (From the Greek word for fire) forms when hot, molten rock crystallizes and solidifies. The molten rock originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Hits - 1917 |
| immunologic functions | Production and action of cells that fight disease or infection. Hits - 1626 |
| impaired | Being classified as weakened or damaged. Hits - 1581 |
| impending | Is about to happen. Hits - 1711 |
| impenetrable | Impossible to pass through or enter. Hits - 1876 |
| indigenous breeds | Originating or occurring naturally in a particular place, native Hits - 1817 |
| indiscriminately | In a random manner; unsystematically. Hits - 1741 |
| indistinguishable | Not being able to be identified as different or distinct. Hits - 1764 |
| inexplicable | Unable to be explained or accounted for. Hits - 1736 |
| infertility | The inability to conceive children or young. Hits - 1660 |
| infestation | The presence of an unusually large number of insects or animals in a place, typically causing damage or disease Hits - 1778 |
| innumerable | Too many to be counted (often used hyperbolically). Hits - 1766 |
| insolvent | Being unable to pay debts owed. Hits - 1581 |
| integral part | It is necessary to the completeness of the whole: This point Hits - 1731 |