My Suggestions

mahithe

adj.

  1. hidden, secret. Hidden. Concealed from view or knowledge; kept secret or not revealed; referring to things not yet made manifest or understood.

Example: Watho ũrĩa ũheetwo ũrũmĩrĩre. Ndũbataire kũmenya maũndũ marĩa mahithe. (What is committed to you, pay heed to; what is hidden is not your concern.); Maũndũ ma magegania manene gũkĩra maya no mahithe, amu marĩa tũũĩ no manyiinyi. (Beyond these, many things lie hidden; only a few of his works have I seen.)