Again
Under the ground, a head covered in dirt emerges... again! It's not the first time you've seen this buried head, nor is it the last. This dirt-covered head hides beneath the ground wherever you go, and keeps popping up to scare you again and again.
さ, さい
ふたた
None
The dirt-covered head asks for help again and again, but you've only got a saw (さ). So you start digging with it, scraping the dirt away, until you see this head has the body of a cyborg (さい)!