valid

有効な

規則に合っている、またはまだ使用が認められているため通用する様子。

やさしい英語で： Accepted because it follows the rules or is still allowed to be used.

• You need a valid passport.
• Is this ticket still valid?
• The agreement remains valid for another year.

使い方： valid for something (This ticket is valid for three days.); valid until something (The permit is valid until December.)

類義語： acceptable, legitimate

反対語： invalid

よく使う表現： valid passport, valid ticket, valid for travel

妥当な、正当な

確かな理由や事実に基づき、認めたり検討したりする価値がある様子。

やさしい英語で： Based on good reasons or facts, and worth accepting or considering.

• She has a valid point.
• There is no valid reason to cancel the meeting.
• His concerns about the cost were valid.

類義語： reasonable, sound, justified, well-founded

反対語： invalid, unfounded

よく使う表現： valid reason, valid argument, valid point