• 艹(grass; plant)
• 洛(Luo River (sound and meaning of falling into water))

Leaves falling from a tree like water flowing in a river expresses the meaning of the character for falling.

• ⺮(bamboo)
• 弟(younger brother; order)

Ancient people used bamboo slips to mark order, like arranging siblings by rank and role.

• 艹(grass; plant)
• 洛(Luo River (sound and meaning of falling into water))

Leaves falling from a tree like water flowing in a river expresses the meaning of the character for falling.

• ⺮(bamboo)
• 弟(younger brother; order)

Ancient people used bamboo slips to mark order, like arranging siblings by rank and role.