| A | B |
| illegible | adj. - impossible or hard to read |
| illiterate | adj. - unable to read or write |
| illogical | adj. - irrational |
| immaculate | adj. - absolutely clean |
| immature | adj. - not fully grown or developed |
| impunity | n. - freedom from punishment |
| inaccessible | adj. - unreachable; hard to get to |
| incessant | adj. = continuing without interruption |
| inflexible | adj. - not easily bent |
| ingratitude | n. - ungratefulness |
| inhospitable | adj. - not showing kindess to guests & strangers |
| insoluble | adj. - incapable of being solved; incapable of being dissolved |
| irreconcilable | adj. - incompatible |
| irrelevant | adj. - off the topic; inapplicable |
| irrevocable | adj. - irreversible; incapable of being recalled or revoked |
| benediction | n. - blessing; good wishes |
| malediction | n. - curse |
| benefactor | n. - person who gives kindly aid, money or similar benefit |
| malefactor | n. - offender; criminal |
| beneficial | adj. - helpful; advantageous |
| beneficiary | n. - person receiving some good, advantage, or benefit |
| benevolent | adj. - kind; charitable |
| malevolent | adj. - showing ill will; malicious; vicious |
| maladjusted | adj. - out of harmony with one's environment |
| malice | n. - ill will; intention or desire to harm another |
| malnutrition | n. - poor nourishment |