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天然 tennen
Adorably off in their own world.
What does tennen mean?
Someone who says slightly wrong things with total sincerity and makes everyone smile. It's usually affectionate — but said about a person rather than to them, it can tip into calling them dim.
Example
彼女、ちょっと天然なところがあるよね。
She's a bit of a lovable airhead, isn't she.
Vibe
Who you can say this to, and how it lands.
Be careful This one carries weight. Read the meaning and the story before you say it to anyone.
The story behind tennen
Tennen is short for tennen boke: a natural-born boke, someone who lands the comedy without meaning to. The ordinary word means natural, as in natural spring water, which is exactly the joke — this airheadedness isn't performed, it's the factory setting.
Television variety shows made it a whole personality type from the 1990s on, and the label stuck to any celebrity who misread a word charmingly. Among friends it lands as warm, almost a compliment. Aimed at a colleague behind their back, though, it stops meaning charming and starts meaning slow, so read the room before you hand it out.
Get tennen in your pocket
天然 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.
