Where does “ดั้ง” come from?

ดั้ง (Thai) comes from Japanese 段, from Chinese 段.

ดั้ง (Thai): nose; bridge; rank

Definitions

Step	Language	Word	Meaning
1	Japanese	段	steps ; stairs; rating; ranking; row; line
2	Chinese	段	—

ดั้ง — Etymology, Origin & Word History | Etymology Explorer