無効
0%
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Base noun form. Used to describe something that is not valid, has no effect, or is unavailable. Often appears in legal, technical, or formal contexts.
Theme
At a company meeting, User and their colleague Mr. Tanaka discuss a policy change that has been declared invalid due to legal issues.
無効
むこう
invalid / no effect / unavailable
Advanced ExpansionAbstract Concepts
Memory Hook
Imagine a ticket that says 'no effect' — it's invalid and useless. Think 'mukou' sounds like 'moo-cow' that can't moo, so it's invalid! 'Moo-cow' → 無効 (mukou, 'invalid').
Cultural Note
In Japan, 『無効』 (mukou, 'invalid') is often seen on official documents, tickets, or contracts to indicate they are no longer valid or have no legal effect, such as expired coupons or voided agreements.
Forms
Base: 無効Base noun form. Used to describe something that is not valid, has no effect, or is unavailable. Often appears in legal, technical, or formal contexts.