골치가 아프다

To have a headache from a complicated or annoying problem; used when something is mentally exhausting or stressful

내 코가 석 자다

Used when you're too overwhelmed with your own problems to help others; literally 'my nose is three feet long.'

눈앞이 캄캄하다

To feel hopeless or not know what to do next; literally 'everything goes dark in front of my eyes.'

소송

A lawsuit; a legal process where someone brings a problem to court for resolution

방음

Soundproofing; the blocking or isolation of sound from entering or leaving a space

반품

Returning a purchased item to the store, usually for a refund or exchange

사유

A reason or cause behind something, often used in formal or written contexts

이의

An objection or disagreement with a decision, statement, or situation

제기하다

To raise or bring up an issue, opinion, or objection, especially in a formal setting

화사하다

Bright, vibrant, and cheerful in appearance—often used to describe clothing, makeup, or someone's energy.

안내 문구

A short notice or informational phrase meant to guide, warn, or inform users

규정

An official rule or regulation that must be followed in a certain context (e.g., workplace, school)

하자

A defect or flaw, usually in a product or building that affects function or quality

환불

A refund; returning money to the customer for a returned or faulty product

실천

Putting ideas or plans into action; following through on what you say you'll do.

떼다

To detach or remove something that is attached or stuck to another surface

배송

Delivery or shipping of goods to a customer or location

무상

Free of charge; given or provided without requiring payment

도난당하다

To have something stolen; to be a victim of theft

여행자 보험

Travel insurance; coverage for accidents, illness, or loss while traveling

쑤시다

To ache with a sharp, dull, or constant pain—often in joints or muscles

작동

The operation or functioning of a machine or device

신축성

Elasticity or stretchiness, especially in clothing or materials

착용감

The way something feels when worn, in terms of comfort or fit

승차감

The level of comfort experienced while riding in a vehicle

절차

A process or procedure; the proper steps to complete a task officially or formally

보편화되다

To become widespread or normalized in society; to become common practice

미니홈피

A personal mini-homepage, often used for blogging or sharing personal updates (e.g., Cyworld)

블로그

A blog; a website or page for sharing personal thoughts, stories, reviews, or information

막상

Used when the actual experience differs from what was expected; ‘when it really happens.’

주민 등록 번호

Resident registration number; a Korean national ID number used for official purposes

입력하다

To input or enter data, typically using a keyboard or touchscreen

고려하다

To consider or take into account various factors before deciding

개선하다

To improve or make something better than before

일반적이다

Common, typical, or standard in everyday situations

삼가다

To refrain from doing something, usually out of respect or caution

청결

Cleanliness or hygiene; the state of being clean and sanitary

부득이하다

Inevitable or unavoidable; used when something had to be done for a justifiable reason

서운하다

To feel hurt or disappointed, especially due to unmet expectations or feelings of neglect

서먹하다

To feel awkward or uncomfortable around someone, especially if you're not close or had a falling out.