What is a -master?
-master comes from "master" (one who has mastery or authority over something) and creates compounds naming those who exercise authority or mastery in a specific domain: Education and knowledge: • schoolmaster = a male teacher in a school (formal, classical) • headmaster = the principal of a school (British English) • grandmaster = the highest rank in chess or martial arts • choirmaster = the director of a choir Authority and control: • taskmaster = one who imposes demanding work • ringmaster = the presenter who directs a circus • postmaster = the person in charge of a post office • webmaster = the person who manages a website • quartermaster = a military officer responsible for supplies