proclaim

declare, announce, proclaim, promulgate mean to make known publicly. declare implies explicitness and usually formality in making known <the referee declared the contest a draw>. announce implies the declaration of something for the first time <announced their engagement at a party>. proclaim implies declaring clearly, forcefully, and authoritatively <the president proclaimed a national day of mourning>. promulgate implies the proclaiming of a dogma, doctrine, or law <promulgated an edict of religious toleration>.

The Latin word clamāre, meaning “to shout” or “to cry out,” gives us the root clam and its form claim. Words from the Latin clamāre have something to do with shouting. To exclaim is to cry out in a sudden or emotional way. To proclaim is to announce or shout something publicly. Clamor is noisy shouting.