Here's the breakdown:
* Mwa - This prefix often indicates "one who" or "the one who".
* Girũ - This word means "rain" in Kikuyu.
Therefore, Mwagiru signifies someone who is associated with rain, possibly someone who brings rain or someone who is born during the rainy season. It's a name that evokes images of life-giving water and prosperity.
The name Mwagiru is often given to children born during the rainy season or in families who are hoping for a good harvest. It can also be a symbolic name, indicating someone who brings joy and blessings.