不屈 in Chinese / Japanese...

不屈 is the short form of a longer Chinese word and also a word used in Korean and Japanese to express the idea of being indomitable. It literally means “will not bend,” “will not crouch,” “will not yield,” “will not flinch,” or “will not submit.”

Note: Some will translate this as “indomitable spirit”; however, technically, there is no character to suggest the idea of “spirit” in this word.

寧死不屈 is often translated as “Death Before Dishonor.”

The literal translation is more like, “Better die than compromise.” The last two characters mean “not to bend” or “not to bow down.” Some might even say that it means “not to surrender.” Thus, you could say this proverb means “Better to die than live on my knees” or simply “no surrender” (with the real idea being that you would rather die than surrender).

不撓不屈 is a Japanese and Korean word that means tenacity, indomitableness, or dauntlessness.

不屈不撓 means “Indomitable” or “Unyielding.”

不屈不撓 is a long word by Chinese standards. At least, it is often translated as a single word into English. It's actually a proverb in Chinese.

If you want to break it down, you can see that the first and third characters are the same. Both mean “not” (they work as a suffix to make a negative or opposite meaning to whatever character follows).

The second character means “bendable.”

The last means “scratched” or “bothered.”

So this really means “Won't be bent, can't be bothered.” I have also seen it written as “Will not crouch, will not submit.” This comes from the fact that the second character can mean “to crouch” and the last can mean “to submit” (as in “to give in” such as “submitting to the rule of someone else”). This may explain better why these four characters mean “indomitable.”

Notes:
Some will translate this as “indomitable spirit”; however, technically, there is no character to suggest the idea of “spirit” in this word.
Other translations include indefatigability, indomitableness, or unremitting tenacity.

The first two characters can be stand-alone words in Chinese.
In Japanese, this is considered two words (with very similar meanings). It's more common to see the word order flipped to 不撓不屈 in Japanese.
The same characters are used in old Korean Hanja. Just like in Japanese, the words are swapped to 不撓不屈 creating a word pronounced “불요불굴” in Korean.

See 不撓不屈

百折不屈 is a Korean proverb that means “indomitable spirit,” at least, that is the way it is commonly translated in martial arts circles (Taekwondo, Hapkido, etc.).

The literal translation is “[one] hundred [times] broken [still] don't succumb.”
Or more naturally translated, “Even if attacked/beaten one hundred times, still be undaunted/indomitable.”

Notes:
Some will say this is one long word rather than a proverb.
This is also a proverb/word in Chinese though rarely used in modern times.

不屈の精神 is one of several versions or ways to write “Indomitable Spirit” in Japanese.

This one is the famous “Fukutsu no Seishin” phrase.

谦逊正直温柔忍耐克己不屈 are the virtues used by Choi Kwang Do Martial Arts.

The characters shown here are in the ancient Korean Hanja form of writing. If you wish for a Korean Hangul form of these tenets, we can arrange that with our Master Calligrapher Xing An-Ping (click on the Hangul next to the South Korean flag above to order this in Hangul).

跆拳道精神禮義廉耻忍耐克己百折不屈 is General Choi's writing that is often called “The Tenets of Taekwon-do.”

The actual title would be translated as “Taekwondo Spirit” or “The Spirit of Taekwondo.” It was originally written in Korean Hanja (Chinese characters used in Korea for about 1600 years).

廉耻精進忍耐遵守克己謙遜百折不屈 are the tenets of Tang Soo Do.

After some research, it appears this list was compiled in English based on Taekwondo tenets. We filled in a few of the words that did not have a corresponding Hanja or Hangul. If someone else has a better list with characters included, please contact me.