Split, Tear
When a yakuza takes a knife to clothes, it will of course cause a split or tear.
It doesn't matter if it's a yakuza member or not. Any knife will cause a split or tear in clothes.
れつ
さ
None
"I want to split and tear that." You agree, so you say Let's (れつ) do it.
Think of a thing you want to tear with your yakuza buddy. You're into it, so you agree and say "Ret's do it!"