I. ˈhelish, -lēsh adjective
Etymology: hell (I) + -ish
: of, resembling, or befitting hell : causing torment : devilish
nothing more hellish than warfare within the soul — Frank Yerby
• hell·ish·ly -lə̇shlē, -li adverb
• hell·ish·ness -lishnə̇s, -lēsh- noun -es
II. adverb
: in an execrable manner
the child acted hellish all day
— sometimes used as an intensive
a hellish cold day