Chữ Nôm form of lên

It spells Vietnamese lên, meaning “to go up” or “rise.”

Chữ Nôm was the older Vietnamese writing system. Its users adapted Chinese character forms and their components to write Vietnamese words; the same spoken verb is written lên in the modern Latin-based Vietnamese alphabet.

A Nôm dictionary cites this form in Ngọc âm, Ức Trai (associated with Vietnamese writer Nguyễn Trãi), and Thi kinh, a Nôm verse version of the Book of Songs. The lines show a moon rising and a tired rider climbing a rocky hill.