My Suggestions

gĩatũmire

v.

  1. it (class 7) having caused (perfect)

Example: "Nĩkĩ gĩatũmire rũhonge rwa gĩthome rwa mbĩrĩrie kũhaka ngari ciothe cia thukuru rangi wa yellow?" — What made the education department decide to paint all school vehicles yellow?