騰 means “soar, surge, rise”

とう · tou

Also: leaping up, jumping up, rising, advancing

Kun'yomi (Japanese reading)
あがる, のぼる
On'yomi (Chinese reading)
トウ

JLPT N1 · Taught in secondary school · 20 strokes

The story

A horse (馬) under the top of 券, beside flesh (月): picture a stallion rearing up into the air. 騰 is surging up: 沸騰 is water at a boil, 高騰 is a price spike in the news, and 暴騰 is prices shooting through the roof.

Used in 高騰 (koutou, sharp rise in price), 沸騰 (futtou, boiling), and 暴騰 (boutou, price surge)

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