The words master and mister are confusing. They are spelled with only one letter’s difference, but they do not reference the same meanings. To make things even more complicated, master has more than one meaning, and one has dropped out of modern usage. Both master and mister are male titles in English. To whom does each word apply? What are the other possible meanings of these terms? To find out, you will have to continue reading this article, in which I explain the differences between these two terms.
Old English mæg(i)ster (later reinforced by Old French maistre ), from Latin magister ; probably related to magis ‘more’. The word mister originated from mid-16th century: weakened form of master1 in unstressed use before a name.
Master as noun:
He acceded to his master's wishes.
I'm a master of disguise.
Master as adjective:
Master as verb:
I never mastered Latin.
Mister as noun:
Sir Commerford is master-of-arms here at the castle.
I am the master printmaker here at the studio.
In prints, Segers was both a master technician and a visionary, besotted with color, fascinated by the textures possible with both the etching needle and other processes like the sugar lift, which he invented. –The New York Times
The driver lets him out just south of Nashville, and when the speaker in the song calls him Mister, the gaunt figure at the wheel says there’s no need, that everyone simply calls him Hank. –The Washington Post
Master or mister:
Titles, honorifics, and other designations can be difficult to remember, especially for non-native speakers. Mister is a title for an adult male. Master is a title for a minor male, or someone who is in charge of something. Since master and in charge both contain the letter A, you can use that letter as a reminder of when to use master.