Antonyms:

abrogate,cancel,overthrow,shatter,upset,
annul,destroy,shake,unsettle,weaken.

Prepositions:

Confirm a statement by testimony; confirm a person in a belief.


CONGRATULATE.

Synonym:

felicitate.

To felicitate is to pronounce one happy or wish one joy; to congratulate is to express hearty sympathy in his joys or hopes. Felicitate is cold and formal. We say one felicitates himself; tho to congratulate oneself, which is less natural, is becoming prevalent.

Antonyms: