笃信

Traditional form:

篤信

Pinyin (reading):

dǔxìn

Definitions:

• to sincerely believe

Characters:

• 笃 - deep, serious; genuine, sincere, true
• 信 - to trust, to believe; letter, sign

Traditional characters:

• 篤 - deep, serious; genuine, sincere, true
• 信 - to trust, to believe; letter, sign