twins
孿 centers on the concept of twins: two offspring born together. The meaning is narrow and concrete, with no major abstract extensions.
孿 combines 䜌 (a phonetic component associated with binding or connecting) with 子 (child), suggesting the idea of connected or paired children, i.e., twins. The exact historical development is uncertain.
The top 䜌 looks like a tangled knot, and the bottom 子 is a child. Imagine two children tangled together at birth—they are twins.
For サン, picture a pair of twin suns (サン) rising together: sun -> サン, and the two suns represent the twin children.