When we talk about something that is not specific, it typically means that the subject is vague or unclear. Synonyms for this type of situation can include indefinite, arbitrary, broad, vague, uncertain, or unclear. The opposite of specificity is ambiguity, which means that the subject can be interpreted in various ways. These synonyms can be used in different contexts, such as in scientific research, legal proceedings, or everyday communication. It's important to choose the right words to convey your message accurately and precisely. When in doubt, a thesaurus can be a helpful tool to find the best synonym for "not specific".