Extreme in Chinese / Japanese...

極度 means extreme, intense, and sometimes "maximum" or "zenith" depending on context.

The first character means extremely or utmost.

The second character means degree or capacity.

貞烈 is the Japanese Kanji for, "Extreme Faithfulness".

The first Kanji means "firm adherence to one's principles", chastity (of a woman), chaste, etc.

The second Kanji means ardent, intense, fierce, stern, upright, to give one's life for a noble cause, exploits, achievements, virtuous, and in some contexts, heroic.

Now you get the idea why this refers to someone who is extremely faithful (to a cause, themselves, their religious beliefs, or their philosophy.

This one way to say best friend in Chinese.

The first character can mean "most", "extreme" or "best".
The second character means "friend" or "friends" (plural forms work differently in China).

Can also be translated as "close friend" or "most intimate friend".

See Also:  Friendship | Soulmates

至愛 can mean the best love or most sincere love of your life.

This could be a romantic love such as the love you have for your spouse or a boyfriend / girlfriend.

It can also apply to the extreme love you have for your children or a parent, and maybe a really good friend.

See Also:  I Love You

最愛 is a Japanese word that means the best love, beloved, or most sincere love of your life.

This could be a romantic love such as the love you have for your spouse or a boyfriend/girlfriend.

It can also apply to the extreme love you have for your children or a parent, and maybe a really good friend.

This Chinese and Korean word conveys the idea of extreme self-control and perhaps self-sacrifice, and obedience.

紀律 matches the kind of "discipline" I was in the Marine Corps. There is also an additional idea of maintaining order or being orderly in your tasks.

This idea would also fit an athlete training for the Olympics who gives up many pleasures to stay focused on their training.

See Also:  Self-Control | Will-Power

It's a little strange as calligraphy, but 至 would be the character which means "best" or "extreme" in Chinese and Korean.

The problem is, this is seldom used alone. It's mostly used in combination with other characters to make words like "best friend", "best food", and "best love".

I do not recommend this character for a wall scroll. It's better if you find a more specific term that fits your circumstances.

Note: This can be pronounced in Japanese and has similar meaning but it is rarely if ever used in modern Japanese.

This an alternate way to say best friend in Chinese.

The first character can mean "most", "extreme" or "best". The second character means "making friends" or "building friendship". There's sort of a suggestion with the second character that fate caused you to intersect in life and become friends (that character can mean intersection in some context).

This can also mean "most intimate friend", "very good friend of long standing", or "closest friend".

See Also:  Friendship | Soulmates

狂 is a single character that means "crazy" in Chinese, Japanese Kanji, and old Korean Hanja.

狂 means crazy, unrestrained, lunatic, insane, confused, deranged, wild, or mad.

This can also refer to an extreme enthusiast (like a football fan). But then, it can also refer to a person possessing a mental abnormality.

In some context, this can mean conceited (it probably won't be read that way on a wall scroll).

A warning: 狂 is an odd selection for a wall scroll. You should only order this if you plan to bewilder or confuse those who see it. It kind of says something about you, something that most native Asian people will not view in a good light.

These two characters mean "iron palm", the martial arts technique taught by Brian Gray and others.

This term can mean different things to different people. The consensus is that rather than a type or style of martial arts, this is a technique for refining hand position and strengthening of hands to strike blows for with maximum force and effect.

The regime may include herbal treatments and special exercises to fortify the hands.

In more extreme versions, the carpals and metacarpal bones in the hand are systematically broken, so that when they heal, they will become stronger.

Japanese note: This does make sense in Japanese (though the version shown above is the ancient form of the first Kanji) this is far from a commonly-known term.