fiercest

ADJECTIVE

violent, menacing

Synonyms

STRONGEST

angry bold brutal cutthroat dangerous ferocious fiery furious intense murderous passionate powerful raging relentless savage stormy strong terrible vehement vicious

WEAK

animal ape awful barbarous bloodthirsty blustery boisterous brutish cruel enraged fell feral flipped frightening horrible howling impetuous infuriated malevolent malign primitive raving tempestuous threatening tigerish truculent uncontrollable untamed venomous wild

Antonyms

STRONGEST

apathetic calm cold cool dull gentle good happy indifferent kind mild moderate nice pleasant quiet tame uncaring weak

WEAK

meek nonviolent peaceful tender unthreatening

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

While the trial was under way, SpaceX announced a deal to lease computing power to OpenAI’s fiercest rival, Anthropic, which had found itself constrained after its Claude Code product took off.

From The Wall Street Journal • May 16, 2026

On the face of it, crossing between camps in one of rugby's oldest and fiercest rivalries might strain respect.

From BBC • Apr. 25, 2026

The fiercest subject of debate has been around whether to allow plants if they are well-watered.

From Los Angeles Times • Apr. 25, 2026

The only thing standing in their way is the opponent that Team USA has spent a year obsessing over: Canada, the sport’s ultimate powerhouse and the Americans’ fiercest rival.

From The Wall Street Journal • Feb. 21, 2026

The lions in the Atuot region were said to be the fiercest in the world.

From "A Long Walk to Water" by Linda Sue Park