assist(介)

This kanji depicts a person wearing armor with protective gear on both sides. Because of this, it came to mean “to assist” or “to care for”.

介護（kaigo）:Providing daily assistance to the sick, the elderly, or people with disabilities who cannot take care of everyday tasks like eating, bathing, and dressing on their own.
介入（kainyu）:Forcing one’s way into a line, a conversation, or a space where one doesn’t belong.
介抱（kaihou）:Looking after and tending to sick or injured people to help them recover.