纯笃

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

Wiktionary

Entry Composition

1 纯 chún
  1. pure
  2. simple
  3. unmixed
  4. genuine
=2 笃 dǔ
  1. (bound form) sincere; genuine
  2. (bound form) (of an illness) serious
=2 笃 dū
  1. (dialectal) bottom of a container
  2. (dialectal) buttocks; bottom
  3. (dialectal) stinger of a bee, wasp or scorpion
  4. (dialectal) to follow closely behind
  5. bottom of a container
  6. buttocks; bottom
  7. stinger of a bee, wasp or scorpion
  8. to follow closely behind