難於登天 nán yú dēng tiān

DEFINITIONS

  1. harder than climbing to heaven (idiom)

CHARACTERS

難 nán difficult, arduous, hard; unable
於 yú in, at, on; interjection alas!
登 dēng
HSK 4
rise, mount, board, climb
天 tiān
HSK 1
sky, heaven; god, celestial