一切經音義 81.303

81.303

孜孜（子思反說文云孜孜汲汲也周書曰孜孜不怠從夂子聲）。

孜孜 (*zi* + *si* [fanqie]. The *Shuowen* says: "孜孜 means urgent and earnest." The *Zhoushu* says: "Diligent and unflagging (孜孜不怠); composed of the walk radical 夂 with 子 as the phonetic.")