My Suggestions

Kwambwo

v.

  1. to crucify; to be nailed to a cross for execution, method of death penalty associated with Jesus Christ in Christian teaching, foreign to traditional Gĩkũyũ practices

Example: "Good Friday nĩ mũthenya ũrĩa Akristiano makũngũyagĩra kwambwo mũtharaba inĩ kwa Jesu Kristo" — Good Friday is the day when Christians commemorate the crucifixion of Jesus Christ.