Schoolmaster
Part of speech: noun
Definition: The person in charge of a school.
Part of speech: verb
Definition: To teach in the capacity of schoolmaster.
Master
Part of speech: adjective
Definition: masterfulmain, principal or predominanthighly skilledoriginal
Part of speech: verb
Definition: to be a masterto controlto learn to a high degree of proficiency
Part of speech: noun
Definition: Someone who has control over something or someone.Owner of an animal or slave.The captain of a merchant ship; a master mariner.Someone who employs others.An expert at something.A tradesman who is qualified to teach apprentices.A skilled artist.A courtesy title of a man or a boy; mister. See Master.The original of a document or of a recording.The primary wide shot of a scene, into which the closeups will be edited later.A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings.
Example sentence: The hardest arithmetic to master is that which enables us to count our blessings.