祭天

jìtiān
  1. (archaic, historical) to offer sacrifices to heaven
  2. to offer sacrifices to heaven

Wiktionary

Entry Composition

=1 祭 Zhài surname Zhai
=1 祭 jì
  1. to offer a sacrifice to (gods or ancestors)
  2. (in classical novels) to recite an incantation to activate a magic weapon; to wield (sth magic)
  3. (bound form) ceremony
  4. (Tw) (bound form) (celebratory) festival
2 天 tiān
  1. day
  2. sky
  3. heaven