What does suffix -cian mean?

The suffix "-cian" is used to form nouns that refer to a person who practices or is skilled in a particular art, profession, or activity. It's often used in words related to:

* Arts and Crafts: musician, magician, electrician, technician

* Sciences and Professions: physician, historian, politician, mathematician

* Other Activities: beautician, librarian, custodian, mortician

Origin: The suffix "-cian" comes from the Latin word "-cianus," which means "belonging to" or "pertaining to."

Examples:

* Musician: A person who plays music.

* Physician: A doctor who practices medicine.

* Historian: A person who studies and writes about history.

* Beautician: A person who provides beauty treatments.

Note: While "-cian" is a common suffix, there are also words that use "-ian" instead, like "librarian." The distinction isn't always clear-cut, and both forms can be correct in some cases.