訓 さ(く),-ざき ・ 音 ショウ
漢越音: tiếu
Originally the character for laughing (tiếu); the Japanese likened a flower opening to a smile, so it came to mean bloom.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
桜の花が咲いた。 (さくらのはながさいた)
The cherry blossoms have bloomed.