前衛 is the Chinese, Japanese Kanji, and old Korean Hanja for an advanced guard, vanguard, or avant-garde.

This can also refer to a forward (in soccer / futbol).

護惜 is a Zen Buddhist word that means to protect, guard, treasure, and/or cherish.

残心 is a Japanese Kanji word meaning: continued alertness; unrelaxed alertness; remaining on one's guard; lingering mind, and being prepared for a counterstrike. This context is used in martial arts, which is probably why you are looking up this word.

In archery and golf, it can be the follow-through.

In the context of love and relationships, it can be lingering affection, attachment, regret, regrets, or reluctance.

オモイ is the name Omoi in Japanese.

This may refer to the Naruto characters named Omoi. He is a shinobi of Kumogakure, part of the Samui Team, and became the 5th Raikage's personal guard.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

防 is a single Chinese character and Korean Hanja that means to protect, defend, guard against, prevent, ward off, or counter.

防 means the same thing in Japanese, though seldom seen alone as a single Kanji. When written alone, it could be the Japanese surname Fusegi.

看護 is one title (of a few) for nurse in Chinese, Japanese Kanji, and old Korean Hanja.

In most cases, this title refers to a hospital nurse, those who participate in the art of nursing and is a term for an army nurse (especially in Japan).

The first character means “to look after” or “to watch over.” The second character means “to protect” or “to guard.”

魏 is a surname that romanizes as Wei in Chinese (Mandarin).

This is not the only Wei: The surname Wei (魏, 卫, 危, etc.) is a common Chinese surname with multiple origins, often meaning "defend/guard" (卫) or "leather" (韦) from ancient states or official titles, also used by various ethnic groups, and is a significant name in Chinese history, appearing in texts like the Hundred Family Surnames. Its Cantonese romanization is often "Wai".

守土有責 is a Chinese proverb that expresses one's duty to defend the country.

守 means to guard, defend, keep watch, abide by the law, and/or observe (rules or ritual).
土 means land, earth, or soil.
有 is a possessive modifier in effect meaning “is a.”
責 means duty or responsibility.

So you get a literal translation of “Protecting [the] land is [a] duty/responsibility.”

守護天使 is the title used for guardian angel in Chinese and Japanese Kanji.

It's used in the same way we use this title in the west - such as a guardian angel watching out for you and allowing you to survive a disaster or accident.

The first two characters mean to guard and protect. The second two mean “angel” (literally “Heaven's messenger”).

神さまが守るように is about as close as you can get to, “God Bless You” in Japanese.

This literally means “[May] God Protect [You].” It can also mean “God is Always With You,” as the word in this phrase that means “protect” can also mean to follow or be with. In fact, the Japanese dictionary entry for that word reads like this: to protect; to guard; to defend; to keep (i.e. a promise); to abide; to observe; to follow.

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

The first character, 武, is the spirit or essence of a warrior. The second character, 士, means soldier, officer, or official. 武士 is also used appropriately enough to describe a piece of a chess game. 武士 can also be translated as a soldier, cavalier, palace guard, or samurai, and sometimes as a knight. I've occasionally seen this translated as strong man or tough man (gender not necessarily implied).

By far, 武士 is the most common way to write warrior in Chinese characters, Japanese Kanji, and old Korean Hanja.

Note: In Japanese, this is Bushi, as in Bushido.

See Also:  Knight | Chinese or Korean Army General | Marine | Samurai

提防律師 is a kind of Chinese joke about lawyers.

The first two characters mean “guard yourself against (an attack)” or “beware.”
The last two characters can mean lawyer, attorney, or solicitor.

Separately, those characters mean law/regulation/control and master/expert/teacher. Here, you can see the attorney meaning is pretty clear in the individual characters.

Please note this is Chinese only (it won't make sense in Japanese, and the last two characters are sometimes translated together as “Buddhist Priest” in Japanese).