| Word | Meaning |
| Imposter | One who assumes name or title or someone else for deceiving others. |
| Impracticable | That which cannot be practiced |
| Impregnable | Incapable of being seized by attack |
| Improbable | That which is not likely to happen |
| Inaccessible | Incapable of being reached. |
| Inadmissible | Incapable of being admitted or allowed. |
| Inanimate | Without life |
| Inaudible | A sound that cannot be heard |
| Incombustible | Incapable of being burnt. |
| Incomprehensible | A statement which cannot be understood |
| Incorrigible | One who cannot be corrected |
| Incredible | That which cannot be believed |
| Incurable | That which cannot be cured |
| Indefatigable | One incapable of being tired |
| Indefensible | That which cannot be defended |
| Indescribable | That which cannot be described |
| Indestructible | Incapable of being destroyed. |
| Indispensable | Something that is essential and cannot be dispensed with |
| Indivisible | Incapable of being divided. |
| Indoor | Something carried on within door or under cover. |
| Ineligible | Not being able to be elected or selected under the rules. |
| Inevitable | That which cannot be avoided |
| Inexcusable | Incapable of being justified. |
| Inexhaustible | Incapable of being tired out. |
| Inexplicable | That which cannot be explained |
| Inexplicit | Not definitely or clearly expressed. |
| Inexpressible | Incapable of being expressed in words. |
| Infallible | A remedy which never fails |
| Infanticide | The act of killing an infant |
| Infection | A disease spread by contact |
| Infinite | Not limited by person or number. |
| Inflammable | Something that is quickly and easily set on fire and burned |
| Inimitable | A method that cannot be imitated |
| Insatiable | That which cannot be satisfied |
| Insecticide | That which kill insects. |
| Insoluble | Incapable of being dissolved in a liquid |
| Insolvent | One who is unable to pay his debts |
| Insomnia | Loss of sleep |
| Insurmountable | Incapable of being overcome. |
| Interpolate | Inserting new matter in a book |
| Intervene | Anything pushed inside veins |
| Intestate | One who dies without a Will |
| Introspection | The action of looking back on past time |
| Invincible | That which cannot be conquered |
| Invisible | A thing that cannot be seen with human eyes |
| Invulnerable | That which cannot be hurt |
| Irreconcilable | Incapable of being reconciled. |
| Irrecoverable | Incapable of recovered, regained. |
| Irrelevant | Not applicable |
| Irreparable | A loss of damage that cannot be compensated |
| Irrevocable | That cannot be altered or withdrawn |
| Irritable | A man who is easily irritated |
| Itinerant | One who travels from place to place |
| Itinerary | A planned route or journey, details of travel |
এই লেকচারের পরের পেইজে যেতে নিচের 
…. তে ক্লিক কর।