IPA: //ˈtiːtʃər//
KK: /ˈtiːtʃər/
A person whose job is to help others learn by providing instruction and guidance.
The teacher explained the lesson clearly to the students.
Teacher → The word is derived from the Old English 'tǣcan' (meaning to show or point out) and the agent suffix '-er' (meaning a person who). A teacher is thus a person who shows or points out knowledge to others.
Think of someone who 'shows' ('tǣcan') you how to learn — that's what a teacher does.