可望而不可即

• 口(mouth; opening)RADICAL
• 丁(man; adult male)PHONETIC

A mouth uttering words of approval with a sound like "ding" gives you the character meaning "can" or "able."

• 亡(lost; fled)PHONETIC
• 月(moon)ASSOCIATIVE
• 王(king; land)RADICAL

A king gazes up at the full moon, yearning like an exile longing for home.

• 而(beard; whiskers (pictographic))ASSOCIATIVE

A drooping beard drawn downward became the connective word meaning "and, but, moreover" in sentences.

• 不(no; not; negation)ASSOCIATIVE

A bird flying swiftly upward and never willing to return represents the meaning of swift and unyielding.

• 卩(kneeling person)RADICAL
• 𠤎(bowl of rice full (pictographic))ASSOCIATIVE

A person kneeling and bowing down to a full bowl of rice depicts the image of immediate approach.