Divide
Under the roof of life a mouth with a knife divides cells to create life.
The entire house glows with blobs of life, and the mouth holds the knife in its mouth and cuts the life blobs apart to help them grow.
かつ
わり, わ, さ
None
As it divides life, the mouth begins to look really familiar. It has big teeth and a crooked mustache... it's Wario (わり)! Sometimes Wario cuts himself by accident and just becomes わ (which is all he says too).
Picture Wario's mouth dividing himself now, and creating more, smaller Warios. They all yell WA! and divide up even more until the whole room is full of わりs and わs!