Leiomano is a weapon that people from Hawaii used a long time ago. It is like a big knife with lots of sharp teeth on one side, like the teeth of a shark. The word "Leiomano" actually means "shark's lei" because it looks like a necklace made of shark teeth.
This weapon was used by ancient Hawaiian warriors to protect themselves when they went into battle. They would hold it by the handle and use the sharp teeth on the other end to cut their enemies. It was a very strong and powerful weapon because it could cut through bones and other tough things.
Today, the leiomano is still used in some Hawaiian ceremonies as a symbol of strength and courage. It is a very important part of Hawaiian culture and history. So, it's like a big knife with sharp teeth that warriors used to fight a long time ago in Hawaii and is still important to Hawaiian people even today.