To Heal in Chinese / Japanese...

療養 is “to heal” in Chinese, Japanese Kanji, and old Korean Hanja.

This can also be translated as to get well, to recuperate, to convalesce, convalescence, recuperation, and in certain contexts, medical treatment or to nurse.

癒す is the common word for heal or healing in Japanese.

This word can also mean to cure.

癒しの手 can be translated as “healing hands” in Japanese.

The first two characters mean healing, to heal, to cure, soothing, therapy, comfort, and solace.
The third character is a possessive particle that connects the ideas.
The last Kanji means hand or hands.

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

鐵掌 means “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 hands to strike blows 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.