やる気 means motivation in Japanese.

It also can be translated as willingness (e.g., to do something), eagerness, inspiration, determination, totally willing, fully motivated, and high aspirations.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

See Also:  Enthusiasm | Passion

勇敢 is about courage or bravery in the face of fear.

You do the right thing even when it is hard or scary. When you are courageous, you don't give up. You try new things. You admit mistakes. This kind of courage is the willingness to take action in the face of danger and peril.

勇敢 can also be translated as braveness, valor, heroic, fearless, boldness, prowess, gallantry, audacity, daring, dauntless, and/or courage in Japanese, Chinese, and Korean. This version of bravery/courage can be an adjective or a noun. The first character means bravery and courage by itself. The second character means “daring” by itself. The second character emphasizes the meaning of the first but adds the idea that you are not afraid of taking a dare, and you are not afraid of danger.

勇敢 is more about brave behavior and not so much the mental state of being brave. You'd more likely use this to say, “He fought courageously in the battle,” rather than “He is very courageous.”

盡忠報國 is a proverb that is the tattoo worn on the back of Yue Fei, a famous Chinese warrior who lived until 1142 A.D.

The tattoo can be translated as “Serve the country with the utmost loyalty.” More literally, it means “[The] Ultimate Loyalty [is too] Duty [of] Country.”

Legend has it that this tattoo once saved his life when he was accused of treason.

The first two characters have come to create a word that means “serve the country faithfully” or “die for the country.” Note: It's more a willingness to die for one's country than the actual act of dying.

The last two characters have come to mean “Dedicate oneself to the service of one's country.”

Both of these words are probably only in the Chinese lexicon because of this famous tattoo.

If you break it down, character-by-character, here is what you get:
1. To the utmost, to the limit of something, the ultimate.
2. Loyalty or duty (a sense of duty to one's master, lord, country, or job).
3. Report, recompense, give back to (in this case, you are giving yourself to your country as payback).
4. Country, state, nation, kingdom.

More about the famous warrior and army general, Yue Fei