단어 네트워크: 無効な

Being effective or producing the desired result; having legal force or validity.

A legally binding agreement between two or more parties that specifies terms and conditions. It is commonly used for mobile phones, apartment rentals, and employment agreements.

期限 refers to a time limit, deadline, or expiration date by which a specific action must be completed or a period ends. It is commonly used for business deadlines, document submissions, and the shelf life of food products.

Invalid; not legally or officially acceptable.