Deepfelt is an adjective that describes an emotion or feeling that is strongly and sincerely held. Its antonyms are shallow, insincere, and superficial. Shallow refers to something lacking depth or substance. An insincere emotion or feeling is fake, not genuine, and lacks authenticity. Superficial is also used to describe something that is not deep or profound, and often refers to things that are only surface-level. Therefore, if we use the antonyms of deepfelt, we can express emotions or feelings that are not sincere, lacking depth or substance. Overall, antonyms of deepfelt are important to understand in order to differentiate between genuine and insincere emotions or feelings.