Undelectable is a word that describes something that is unappetizing, unappealing, or unpleasant. To convey the same meaning, one could use the synonyms such as unpalatable, inedible, distasteful, disagreeable, uninviting, unsavory, repugnant, revolting, offensive, unattractive, unappealing, and untempting. These words can be used to describe anything from food to experiences, where something is simply not enjoyable or does not meet one's expectations. The use of synonyms for undelectable can help in adding variety to your writing and make it more interesting and descriptive.