The adjective fearsome means very scary or dangerous. When you describe someone as fearsome, you are saying that they are a very dangerous person.
The ferocious dog was barking ferociously.
The fearsome dragon could easily kill anyone who crosses its path.
adjective
causing fear or dread or terror
Synonyms:
1
Imperials are the most fearsome of all vampires.
2
She is a bit of a tomboy and is fearsome in a quarrel.
3
The cataphracts were both fearsome and disciplined.
4
The dragon however is the most fearsome of the all.
5
Aladdin's mother faints at the sight of the fearsome Genie.
6
Caramon was the strongest of the Heroes of the Lance, and a fearsome warrior.
7
Sometimes he sees fearsome devils in his nightmares.
8
There were fearsome monsters hiding under his house.
9
Although it looks fearsome, Harry tried to keep chasing the wizard.
10
Similarly the sacred bull of India to Thrace and the fearsome real aurochs.