笃

参考释义

笃[dǔ]

• -（忠实;一心一意）sincere;earnest:

  sincereconduct;笃行

  tenaciousofpurpose笃志

  -（病势沉重）(ofanillness)serious;critical:

  bedangerouslyill;beinacriticalcondition;beterminallyill病笃