Slow in Chinese / Japanese...

高速 means “high speed” or “in high gear” in Chinese and Japanese Kanji.

In old Korean Hanja, it also means “high speed” but can also be a nickname for “rapid transit.”

高速 is the best selection if you want to say “speed” in regard to your race car, race boat, or lifestyle. You need this word, which literally means “high speed,” as the Asian word for “speed” alone does not suggest whether you mean fast or slow.

吸入 is a Chinese, Japanese, and old Korean word that means inhale, inhalation, or to breathe in.

吸 by itself can mean to inhale or suck in.
入 means to enter (in this case, the body), so it clarifies that this is the true inhalation of air into the body.

If you need a reminder to breathe (slow down and take a deep breath), this may be the word you want hanging on your wall.

不怕慢就怕站 is a Chinese proverb that translates as: Don't worry about being slow; only worry about standing still.

Figuratively, this means: A slow progress holds some promise but to stand still promises failure.

緩急 is often used as a Korean martial arts term, “speed control.” It's also one of the 8 key concepts of Tang Soo Do.

In other contexts, this can mean priority, pace, tempo, or slow and fast.

太極拳 is the famous Taoist meditation and martial art exercise. The direct translation of these characters would be something like “grand ultimate fist,” but that does not quite hit the mark for what this title really means.

An early-morning walk through any city in China near a park or an open area will yield a view of Chinese people practicing this ancient technique.

A typical scene is an old man of no less than 80 years on this earth, with a wispy white beard and perhaps a sword in one hand. He makes slow moves that are impossibly smooth. He is steady-footed and always in balance. For him, time is meaningless and proper form, and technique is far more important than speed.

For the younger generation, faster moves may look impressive and seem smooth to the casual observer. But more discipline and mental strength are needed to create perfectly smooth moves in virtual slow motion.

Note: There are two ways to Romanize these Chinese characters, as seen in the title above. The pronunciation and actual characters are the same in Chinese. If you really used English sounds/words to pronounce this, it would be something like “tie jee chew-on” (make the “chew-on” one flowing syllable).

慢就是順，順就是快 is the translation to Chinese for “Slow is smooth, smooth is fast” as used by Navy Seals and other military organizations.