天虹

tiānhóng
  1. (literary or dialectal) rainbow (Classifier: 條／条 c)
  2. rainbow (Classifier: 條／条 c)

Wiktionary

Entry Composition

1 天 tiān
  1. day
  2. sky
  3. heaven
=2 虹 hóng rainbow
=2 虹 hòng
  1. (obsolete on its own in Standard Chinese) to fester
  2. only used in 虹洞
  3. to fester
=2 虹 gòng
  1. (historical) a county in modern Anhui, China
  2. a county in modern Anhui, China