Vociferous (adjective)

1. Making a loud and harsh cry.
2. Making a loud, impassioned and often angry outcry.
3. Loud and insistent in expression or complaint.
4. Noisy and complaining, making a loud and insistent expression of protest or disapproval.
5. Loud and forceful in speech or expression.

Origin:

Late 16th century: from latin vociferus (from vox, voc- "voice" + ferre "to carry") + -ous.

Examples:

1. The vociferous crowd was demanding the release of the political prisoner.
2. The vociferous protesters were determined to make their voices heard.
3. His vociferous objections to the new law were ignored by the government.
4. Her vociferous defense of her beliefs won her many supporters.
5. The vociferous debate lasted well into the night.