訓 つつし(む) ・ 音 シン
漢越音: thận
Heart 忄 for meaning; 真 (true, genuine) gives the sound shin and the idea: keep your heart honest and you naturally act with care. See shinchou, prudent and careful.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
彼は慎重に運転します。 (かれはしんちょうにうんてんします)
He drives carefully.