无产阶级

• 一(one; initial)ASSOCIATIVE
• 尢(disabled person; insufficient)ASSOCIATIVE

From the beginning there was a shortage, so 無 means 'nothing at all'.

• 亠(roof; top part)RADICAL
• 丷(two small strokes; sprout)ASSOCIATIVE
• 厂(rock wall; place of production)ASSOCIATIVE

Under a roof and rock wall, sprouts burst forth—that is how vegetable growth is produced.

• 糹(silk thread; strand of silk)RADICAL
• 及(reach; catch up with)PHONO-SEMANTIC

Ranks stack like threads connecting one after another, each step reaching a higher level.