àishì is an adjective meaning 'inconvenient' or 'troublesome', describing something or someone that gets in the way, hinders progress, or creates unnecessary difficulty. The character 碍 (ài) means 'to hinder' or 'to obstruct', while 事 (shì) means 'matter' or 'affair'; together, they literally suggest 'a matter that hinders'. It’s commonly used to describe objects, people, or situations that interfere with efficiency, comfort, or smooth operation — for example, clutter in a workspace or an uninvited guest during a serious discussion.

This word carries a mild, everyday tone and is often used in spoken and written Chinese alike. It’s not strongly negative like 'obnoxious' but conveys practical annoyance — more about functional disruption than moral judgment. It frequently appears after 是 (shì) or 很 (hěn), or in phrases like 太碍事 (tài ài shì, 'too inconvenient') or 不要碍事 (bùyào ài shì, 'don’t get in the way').