Altitude
High-level
noun, な adjective, の adjective
Something that is tall in degrees can either refer to its altitude, or to the fact that it's quite high-level.
Note that this can refer to any altitude, even lower ones. But when used to refer to, for example, skills or a technique, it always talks about a high level or degree.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
高度が下がる
altitude decreases
高度が上がる
altitude increases
高度を下げる
to lower its altitude
高度を上げる
to elevate its altitude
高度3万3000フィート
altitude of 33,000 feet
高度10000メートル
altitude of 10,000 meters
高度なスキル
a high-level skill
高度な研究
sophisticated research
高度なテクニック
an advanced technique
このUFOは、今、高度3万3000フィートのところにいる。
This UFO is now at an altitude of 33,000 feet.
マイケルは、高度なテクニックを使って、むずかしいゲームを次々クリアした。
Michael used advanced techniques to complete one difficult game after another.
高度が一気に上ると、エンジンが止まっちゃうんだよ。
When the altitude gets too high, the engine will suddenly stop.