去甲肾上腺素

• 土(earth; soil; land)ASSOCIATIVE
• 厶(private; personal)PHONETIC

Leaving your own plot of land is what the character Khứ means (go, depart).

• 甲(turtle shell; carapace)ASSOCIATIVE

The character depicts a turtle's shell with a crack running through it, symbolizing the hard protective covering.

• ⺼(flesh; body)RADICAL
• 又(again; right hand)PHONETIC

A kidney is the fleshy organ in the body shaped like a clenched fist.

• ⺊(dot above; high position)ASSOCIATIVE
• 一(standard baseline; norm)ASSOCIATIVE

A dot mark sitting above a horizontal line represents the meaning 'above'.

• ⺾(flesh; body)RADICAL
• 泉(stream; water source)PHONO-SEMANTIC

A gland in the body is like an underground stream that secretes fluid in a steady flow.

• 糸(silk thread; filament)RADICAL
• 龶(coarse undyed thread bundle; top part of thread)ASSOCIATIVE

Raw silk that hasn't been dyed suggests the meaning of pure, simple, and basic.