wrong·ful \ˈ ̷ ̷_fəl\adjective Etymology: Middle English, from wrong (I) + -ful 1.: full of wrong : injurious, unjust, unfair < a wrongful act > 2.: not rightful especially in law : having no legal sanction : unlawful, illegitimate < the wrongful heir to a throne > < wrongful occupation of an estate > • wrong·ful·ly\-f(ə)lē, -li\adverb • wrong·ful·ness\-fəlnə̇s\noun-es