蹑登

niè dēng

2-character word Traditional 躡登

What 蹑登 means

to go up

The characters in 蹑登

蹑nièto walk on tiptoe; to walk quietly; to tread (on)
登dēngto scale (a height); to ascend; to mount

Looking a word up is not learning it. GraphChinese puts all of HSK 1–6 into one dependency graph, teaches each piece only once its prerequisites are solid, and schedules reviews to land just before you would forget.

Start learning — $49 lifetime