fright ‧ en ‧ ers /ˈfraɪtn-əz $ -ərz/ BrE AmE noun [plural] British English informal
[ Word Family: adjective : ↑ frightened , ↑ frightening , ↑ frightful ; noun : ↑ fright , ↑ frighteners ; adverb : ↑ frighteningly , ↑ frightfully ; verb : ↑ frighten ]
put the frighteners on somebody to make someone do what you want by threatening them