たかい
expensive
A price does the same thing a tall building does, which is go up. The tag is tacked たか high い on the wall where you have to squint at it: たかい.
Same word as 高い "high, tall", height and price share one adjective.
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Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.