valid

Definitions

val (strong) + -id (adj.) = 'strong enough to stand.' A valid argument doesn't collapse when challenged; a valid passport holds up legally. The structural image — something that holds up rather than falls apart — runs through every use.

Why It Means This

valid keeps the original 'strength' sense of valēre very literally: a valid claim is one robust enough to survive scrutiny. That's why it bridges logic (a valid inference) and law (a valid contract) without changing its core idea — in both, the thing 'stands up.'

Common Collocations

• 1.valid point有理的观点
• 2.valid argument有效的论证
• 3.valid reason正当的理由
• 4.valid until有效期至
• 5.valid passport有效护照

Example Sentences

• 1.

  That's a valid point — I hadn't considered it.

• 2.

  Your ticket is valid for travel until the end of June.

• 3.

  The experiment's results were valid and could be repeated.

Easily Confused

valid vs. true — A valid argument is well-structured (the reasoning holds), but it can still be valid while being false if a premise is wrong. true is about matching reality. In everyday use people blur them, but in logic 'valid' means the form holds up, not that the conclusion is correct.

Synonym Comparison