Word familynounconfirmationconfirmandconfirmatorconfirmeeconfirmerconfirmingconfirmoradjectiveconfirmed ≠ unconfirmedconfirmableconfirmativeconfirmatoryverbconfirm
a confirmed bachelor/atheist/vegetarian etcSATISFIEDsomeone who seems completely happy with the way of life they have chosen 誓不结婚的单身汉/坚定的无神论者/坚定的素食主义者等
Examples from the Corpus
a confirmed bachelor/atheist/vegetarian etc• There a hybrid service takes place, to which even a confirmed atheist could hardly object.