Vociferous
vəˈsɪfərəs
adjective
expressing opinions or feelings loudly and forcefully
The word 'vociferous' is derived from the Latin word 'vociferari,' which means 'to shout.' When someone is described as being vociferous, it implies that they are vocal and outspoken in expressing their thoughts or emotions.
See how J. K. Rowling, Alexandre Dumas and 1 other author use "vociferous", with its meaning, pronunciation and real book examples.
Examples from books
Next to Sermak himself, Lewis Bort was the most active in rallying those dissident elements which had fused into the now-vociferous Action Party.
Isaac Asimov
Foundation 1 - Foundation
Many citizens, seeing the women flying toward the High Street, leaving their children crying at the open doors, hastened to don the cuirass, and supporting their somewhat uncertain courage with a musket or a partisan, directed their steps toward the hostelry of the Jolly Miller, before which was gathered, increasing every minute, a compact group, vociferous and full of curiosity.
Alexandre Dumas
The Three Musketeers
Their Sickles had been wasted, however; if anything, they seemed to have made Hermione more vociferous.
J. K. Rowling
Harry Potter and the Goblet of Fire