• 一(horizontal line; boundary)
• 卜(stroke descending downward)

A vertical stroke pointing downward across a boundary line marks 'below'.

• 九(number nine; bent arm)

Nine bent fingers curve like an ancient person's arm used to count the largest number.

• 氵(water)
• 㐬(swirling flow; whirlpool)

Water flowing in a whirlpool becomes a stream, which is the circulation of water.

• 一(horizontal line; boundary)
• 卜(stroke descending downward)

A vertical stroke pointing downward across a boundary line marks 'below'.

• 九(number nine; bent arm)

Nine bent fingers curve like an ancient person's arm used to count the largest number.

• 氵(water)
• 㐬(swirling flow; whirlpool)

Water flowing in a whirlpool becomes a stream, which is the circulation of water.