純篤

纯笃
chúndǔ
  1. (literary) pure and sincere
  2. pure and sincere

Wiktionary

Entry Composition

1 純 chún
  1. pure
  2. simple
  3. unmixed
  4. genuine
2 篤 dǔ
  1. (bound form) sincere; genuine
  2. (bound form) (of an illness) serious