The word "esthetical" refers to beauty, artistic style, and taste. Its antonyms or opposite words are "ugly," "unattractive," "inartistic," "unfinished," "messy," and "clumsy." If something is esthetically pleasing, it is visually appealing and pleasing to the senses. On the other hand, if something is unattractive or inartistic, it is not pleasant to the eyes and does not conform to the principles of beauty and aesthetics. While beauty is subjective, it has been an essential part of human culture for centuries, and the antonyms of esthetical help define what is not considered beautiful.