pearl, gem, jewel
珠 centers on small, precious, rounded objects: pearls, gems, and jewels. The core idea is something valuable and bead-like.
珠 combines 王 (jade/jewel) with 朱, which likely contributes the sound and possibly the idea of a red or precious bead. The exact historical development is uncertain.
The left side 王 (jewel) and the right side 朱 (vermillion) together suggest a precious red bead: a pearl or gem.
For シュ, imagine a shoe filled with pearls: shoe -> シュ, and the pearls are the jewels inside.
pearl
rosary; string of prayer beads
jewel; gem
precious orb
red spider lily (Lycoris radiata); cluster amaryllis; cluster belladonna; manjusaka
rosary; string of prayer beads
linking together; tying in a row
calculation on an abacus
variant of gobang (game)
ornamental railing top; bridge railing-post knob
artificial pearls
artificial pearls
Hosta montana (species of plantain lily)
dzi bead; Himalayan agate bead
Cintamani stone; wish-fulfilling jewel
Cintamani stone; wish-fulfilling jewel
Hosta sieboldii (species of plantain lily)
Margaritifera laevis (species of freshwater pearl mussel)
nostoc
apple of one's eye; one's jewel