1. [ adjective ] causing fear or dread or terror
Synonyms: terrible dreadful awful fearful fearsome dreaded dread horrendous horrific direful dire

"the awful war" "an awful risk" "dire news" "a career or vengeance so direful that London was shocked" "the dread presence of the headmaster" "a dreaded disease" "a dreadful storm" "a fearful howling"

Related terms: alarming
2. [ noun ] to inspire with fear
Synonyms: terrorisation terrorization
Related terms: bullying frighten
Similar spelling:   frighteningly