Late 16th century (in an earlier sense). From classical Latin prōmissor person who promises or guarantees (usually in legal context) from prōmiss-, past participial stem of prōmittere + -or.
Definition of promissor in US English:
promissor
nounprəˈmɪsə
Roman Law. A person who makes a promise.
Origin
Late 16th century (in an earlier sense). From classical Latin prōmissor person who promises or guarantees (usually in legal context) from prōmiss-, past participial stem of prōmittere + -or.