de·test·able 
/dɪˈtɛstəbəl/ adjective
/dɪˈtɛstəbəl/ adjective [more detestable; most detestable] formal : causing or deserving strong dislike : deserving to be detested
▪ He found her selfish attitude detestable. [=contemptible, despicable] ▪ He is a detestable villain.
▪ He found her selfish attitude detestable. [=contemptible, despicable] ▪ He is a detestable villain.
— de·test·ably /dɪˈtɛstəbli/ adverb
▪ a detestably cruel act
/dɪˈtɛstəbli/ adverb ▪ a detestably cruel act
