难于登天 nán yú dēng tiān

DEFINITIONS

  1. harder than climbing to heaven (idiom)

CHARACTERS

难 nán
HSK 3
difficult, arduous, hard; unable
于 yú
HSK 3
in, on, at; go to; surname
登 dēng
HSK 4
rise, mount, board, climb
天 tiān
HSK 1
sky, heaven; god, celestial