사전

To carry out two or more tasks or processes at the same time or side by side.

A formal, regular, or standard state of something, often used in the context of education or employment.

The formal or systematic process of acquiring knowledge or skills. A more academic term than '공부' (study).

Teacher (formal term for a person who teaches)

A basis or ground for an action, belief, or argument; evidence or reason that supports a claim.

A task or piece of work allocated to someone as part of a job or course of study; also refers to a challenge or problem that needs to be solved.

Repeated performance of an activity to improve skill.

The arrangement or disposition of people or things in relation to each other according to a particular sequence.

A book used as a standard work for the study of a particular subject.

To revise, modify, or correct something that has already been decided, written, or planned. It aims to improve or update the original.