The word "disapprove of" means to express or have an unfavorable opinion towards someone or something. Synonyms for this phrase include words such as reject, disdain, censure, condemn, denounce, rebuke, disfavor, and discommend. Each of these words has a slightly different connotation or emphasis, but all communicate a negative evaluation of the person or thing in question. For instance, "reject" suggests a complete lack of acceptance or approval, while "condemn" implies strong disapproval due to a perceived moral failing. Using different synonyms for "disapprove of" can help writers add variety and nuance to their language.