不知天高地厚 bù zhī tiān gāo dì hòu

DEFINITIONS

  1. not to know the immensity of heaven and earth
  2. an exaggerated opinion of one's own abilities

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
知 zhī
HSK 2
know, perceive, comprehend
天 tiān
HSK 1
sky, heaven; god, celestial
高 gāo
HSK 1
high, tall; lofty, elevated
地 dì
HSK 3
earth; soil, ground; region
厚 hòu
HSK 4
thick; substantial; greatly