I've no idea what "nuni" is supposed to mean.
But with a name like "Woomba" (knowing about the robot Roomba that vacuums) I"d say that the Woomba is an automatic abortion machine that cleans the womb of of the cellular structure growing inside it.
Hmm. An automatic abortion machine. No human interaction...no guilt...no protestors setting fire to the building...I could market this thing...