Chi Energy in Chinese / Japanese...

This 氣 energy flow is a fundamental concept of traditional Asian culture.

氣 is romanized as “Qi” or “Chi” in Chinese, “Gi” in Korean, and “Ki” in Japanese.
Chi is believed to be part of everything that exists, as in “life force” or “spiritual energy.” It is most often translated as “energy flow” or literally as “air” or “breath.” Some people will simply translate this as “spirit,” but you must consider the kind of spirit we're talking about. I think this is weighted more toward energy than spirit.

The character itself is a representation of steam (or breath) rising from rice. To clarify, the character for rice looks like this:
Steam was apparently seen as visual evidence of the release of “life energy” when this concept was first developed. The Qi / Chi / Ki character is still used in compound words to mean steam or vapor.
The etymology of this character is a bit complicated. It's suggested that the first form of this character from bronze script (about 2500 years ago) looked like these samples:
However, it was easy to confuse this with the character for the number three. So the rice radical was added by 221 B.C. (the exact time of this change is debated). This first version with the rice radical looks like this:
The idea of Qi / Chi / Ki is really a philosophical concept. It's often used to refer to the “flow” of metaphysical energy that sustains living beings. Yet there is much debate that has continued for thousands of years as to whether Qi / Chi / Ki is pure energy or consists partially or fully of matter.

You can also see the character for Qi / Chi / Ki in common compound words such as Tai Chi / Tai Qi, Aikido, Reiki, and Qi Gong / Chi Kung.

In the modern Japanese Kanji, the rice radical has been changed into two strokes that form an X.

The original and traditional Chinese form is still understood in Japanese, but we can also offer that modern Kanji form in our custom calligraphy. If you want this Japanese Kanji, please click on the character to the right instead of the “Select and Customize” button above.

More language notes: This is pronounced like “chee” in Mandarin Chinese, and like “key” in Japanese.
This is also the same way to write this in Korean Hanja where it is Romanized as “gi” and pronounced like “gee” but with a real G-sound, not a J-sound.
Though Vietnamese no longer use Chinese characters in their daily language, this character is still widely known in Vietnam.

See Also:  Energy | Life Force | Vitality | Life | Birth | Soul

Peng, Lu, Ji, An, Cai, Lie, Zhou, and Kao are the eight fundamentals or forces of Tai Chi Chuan or Taiqiquan.

棚 (Peng) refers to the outward (or upward) expansion of energy.
履 (Lu) is often referred to as “rollback.” Lu is the ability to absorb, yield/deflect incoming force.
擠 (Ji) is often thought of as a “forward press.” However, it is also best described as a “squeezing out of space.”
按 (An) is a downward movement of energy, best translated as “(relaxed) sinking.”
採 (Cai or Tsai) translated as “downward pluck.” Cai is a combination of Lu and An.
列 (Lie or Lieh) is “Split” and is a combination of Peng and Ji.
肘 (Zhou) Elbowing.
靠 (Kao) Shouldering (for when the arms are bound/distance is too close to punch).

Source: https://combativecorner.wordpress.com/2015/12/03/the-8-energies-and-5-movements-of-taijiquan/

勇氣 is one of several ways to express bravery and courage in Chinese, Japanese, and Korean.

This version is the most spiritual. This is the essence of bravery from deep within your being. This is the mental state of being brave versus actual brave behavior. You'd more likely use this to say, “He is very courageous,” rather than “He fought courageously in the battle.”

The first character also means bravery or courage when it's seen alone. With the second character added, an element of energy or spirit is added. The second character is the same “chi” or “qi” energy that Kung Fu masters focus on when they strike. For this reason, you could say this means “spirit of courage” or “brave spirit.”

This is certainly a stronger word than just the first character alone.

Beyond bravery or courage, dictionaries also translate this word as valor/valour, nerve, audacity, daring, pluck, plucky, gallantry, guts, gutsy, and boldness.

This is also one of the 8 key concepts of tang soo do.

While the version shown to the left is commonly used in Chinese and Korean Hanja (and ancient Japanese Kanji), please note that the second character is written with slightly fewer strokes in modern Japanese. If you want the modern Japanese version, please click on the character to the right. Both styles would be understood by native Chinese, Japanese, and many (but not all) Korean people. You should make your selection based on the intended audience for your calligraphy artwork. Or pick the single-character form of bravery/courage which is universal.