毋忝厥职
wú​tiǎn​jué​zhí

to fulfill one's duty honorably

  1. 毋 wú
    do not
    (literary) used to prohibit or discourage an action, meaning "do not" or "must not"; equivalent to 不要 bù​yào or 别 bié
  2. 忝 tiǎn
    to shame
    (bound form) to bring shame to; to disgrace. Used to describe failing to live up to the honor or expectations of one's ancestors or parents.
  3. 厥 jué
    his
    (literary) used to mean "his", "her", "its", or "their", equivalent to 其 qí
  4. 职 職 zhí noun
    duty
    (bound form) duty; post; office; official position