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もったいない mottainai
What a waste!
What does mottainai mean?
The pang of regret when something useful is thrown away: food, time, talent, a perfectly sunny afternoon.
Example
まだ食べられるのに捨てるの、もったいない。
Throwing it out when it's still edible is such a waste.
Vibe
Who you can say this to, and how it lands.
Safe to use Fine in ordinary conversation.
Culture note
It carries a quiet respect for objects, as if things had feelings. The word later travelled the world as an environmental slogan.
The story behind mottainai
The word hides an old idea. 勿体 once meant the substance or proper dignity of a thing, and 無い negates it, so もったいない originally described something losing the worth it was owed. That is why it feels different from wasteful: it is not about your money, it is about the thing itself being let down.
In the mid-2000s it travelled. A Kenyan environmentalist and Nobel laureate adopted it at the United Nations as a single word carrying reduce, reuse and recycle plus respect, and it came home slightly more famous than it left. Grandmothers had been using it about half a bowl of rice all along.
Get mottainai in your pocket
もったいない is one of 308 words in YABAI, a Japanese culture snack for Android. Every word comes with its meaning, an example sentence, a vibe check and a story like the one above — in 13 languages, read aloud by your device. Paid app: no ads, no sign-up, no subscription.
