HSK10+
dǔ
deep
Seal script
Clerical script
Regular script
笃 (篤)
deep, true, sincere, genuine; serious (illness); sincere; true
笃
true
笃定
certain
笃信
to believe firmly
笃行
to behave sincerely
笃志
steadfast
Academia Sinica
Make Me a Hanzi
Unicode
Baxter-Sagart
CC-CEDICT
SUBTLEX-CH
MTSU Chinese text computing