Compellable is a legal term that refers to a person who is legally obliged or required to give testimony in court. Synonyms for compellable include forcible, mandatory, obligatory, necessary, and requisite. These terms imply that a person has no choice but to comply with a legal requirement to give evidence or testimony. Another synonym for compellable that is commonly used in legal settings is "witness." In contrast, antonyms for compellable include optional, voluntary, and discretionary, which suggest that a person has the freedom not to testify if they so choose. Overall, the concept of compellable is important in legal proceedings, as it ensures that all parties have access to relevant information and that justice can be served fairly and impartially.