当 means “hit, right”

あたる · ataru

Also: appropriate, himself

Kun'yomi (Japanese reading)
あたる, あたり, あてる, あて, まさに
On'yomi (Chinese reading)
トウ

JLPT N3 · Taught in grade 2 · 6 strokes

The story

Picture three darts thudding into the board below: a hit. 当たる is to hit or to win, a 当たり ice-pop stick gets you another one free, and 本当, "really", is right on the mark.

Used in 本当 (hontou, true/really), 当たる (ataru, to hit/win), and 弁当 (bentou, boxed lunch)

Words with 当

More from Cause & Reason

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.