This is the current mnemonic for this Level 22 vocab:
Remember blood pressure (血圧)? Well, now the blood pressure is tall… so you have “tall blood pressure.” Well that’s dumb. Let’s call it high blood pressure instead.
The idea, though, that 高 represents high is nothing new, introduced way back with the kanji in Level 7 and reinforced in Level 9 with 高さ.
@JenK Sorry to keep bothering you!