自由基清除剂

• 自(nose (pictographic) → self; body)ASSOCIATIVE

Ancient people pointed to their nose when saying "I," so the character for nose also means self.

• 田(rice field; seedling sprouting from field)ASSOCIATIVE

A sprouting seedling stretching up from the field evokes the meaning "from that comes forth, the origin or cause."

• 氵(water; liquid)RADICAL
• 青(green; clear)PHONO-SEMANTIC

Crystal clear green water evokes purity and clarity.

• 阝(earthen mound; village wall; rampart)RADICAL
• 余(surplus; remainder)PHONO-SEMANTIC

Remove the excess remainder along the city wall's edge, like clearing away an earthen mound.

• 齐(even; orderly)PHONO-SEMANTIC
• 刂(knife radical)RADICAL

Using a knife to cut evenly creates the proper dose of medicine.