English Questions: Antonyms and Synonyms PART-4

IMPRECATION: A curse – hurled imprecations at those who would not listen to him.
Synonyms – execration, malediction, anathema.
Antonyms – benediction, benison.

IMPREGNABLE: Unconquerable – an impregnable fortress.
Synonym – invincible.
Antonym – vulnerable.

IMPROPRIETY: Improper act, manners, or expression – guilty of impropriety in public office.
Synonyms – indecency, indecorum.
Antonym – amenity.

IMPROVIDENT: Lacking in thrift; not providing for future needs – an improvident spender.
Synonyms –  prodigal, shiftless.
Antonym – careful, miserly, provident, thrifty.

IMPUGN: To attack or criticize as false; to call in question – impugned his honesty.
Synonym – assail, attack, blast, break, call into question, cast aspersions upon.
Antonym – flatter, praise.