mwĩthĩ

n.

1. youth, young age. Youth, young age. The period of being young; the state or quality of being youthful, typically referring to adolescence or early adulthood.

Example: Ũngĩaga gũcaria indo wĩ mwĩthĩ, ũgaakĩgĩa na indo atĩa wakũra? (In your youth you did not gather. How will you find anything in your old age?); E mwĩthĩ ndũkaareke eeke ũrĩa ekwenda, na ahĩtia ndũkaamũkirĩre. (Do not give him his own way in his youth, and do not ignore his follies.)