むこう無効mukou
1.

Describes a state in which something lacks effectiveness or power, such as a ticket that is no longer valid or a vote that holds no weight.

2.

Refers to a legal action that fails to produce the intended legal consequences due to missing necessary criteria, indicating the action has no legal force or recognition.

3.

Characterizes an instance or action that is rendered ineffective, often resulting from a failure to meet specific requirements, leading to its inability to achieve the desired outcome.

Example:

脅迫のもとになされた約束は無効だ。

むこうとうひょう無効投票mukoutouhyou
1.

A ballot cast during an election that cannot be counted due to errors or failures in meeting voting criteria.

2.

A vote that has been rendered ineffective because it does not conform to the established rules or requirements of the electoral process.

3.

A submitted vote that is marked or completed in such a way that it fails to express a valid choice, resulting in its exclusion from the final tally.

むこうひょう無効票mukouhyou
1.

A vote that cannot be counted due to errors or irregularities in its preparation or submission, rendering it invalid in an election process.

2.

A ballot that has been incorrectly filled out or marked, leading to its rejection by the electoral system, thus failing to contribute to the overall voting outcome.

3.

A cast vote that does not meet the necessary criteria for validity, often due to mistakes made by the voter, resulting in its exclusion from tallying results.