蔽天

bìtiān
  1. (literary) to cover the skies; to blanket the sky
  2. to cover the skies; to blanket the sky

Wiktionary

Entry Composition

1 蔽 bì
  1. to cover
  2. to shield
  3. to screen
  4. to conceal
2 天 tiān
  1. day
  2. sky
  3. heaven