| A | B |
| inherent | firmly established by nature or habit |
| innate | inborn |
| innocuous | harmless |
| innovation | change, introduction of something new |
| insipid | lacking in flavor |
| insolvent | bankrupte |
| instigate | urge;start;provoke |
| insularity | narrow-mindedness; isolation |
| insuperable | insurmountable; unbeatable |
| integrity | uprightness;wholeness |
| intervene | come between |
| intimidate | frighten |
| intractable | unruly; stubborn; unyielding |
| intrepid | fearless |
| inundate | overwhelm flood submerge |
| invert | turn upside down or inside out |
| ironic | resulting in an unexpected and contrary outcome |
| irreproachable | blameless; impeccable |
| jocular | said or done in jest |
| labyrinth | a maze |
| laconic | brief and to the point |
| laggard | slow sluggish |
| lament | grief sorrow |
| lampoon | ridicule |
| lassitude | languor weariness |
| laud | praise |
| lavish | generous |
| lethargic | drowsy dull |
| levity | lack of seriousness |
| linger | loiter or dawdle |
| listless | lacking in spirit or energy |
| lithe | flexible supple |
| lofty | very high |
| lurid | wild sensational |
| luxuriant | abundant |
| malicious | hateful |
| marred | damaged disfigured |
| materialism | preoccupation with physical comforts and things |
| meander | wind or turn in its course |
| mercenary | interested in money or gain |
| mercurial | capricious changing fickle |
| methodical | systematic |
| meticulous | excessively careful painstaking |
| mirth | laughter merriment |
| misanthrope | one who hates mankind |
| miserly | stingy mean |
| misnomer | wrong name incorrect designation |