Then 刮 (ko): scrape, hollow out. A blade (刂) digging into something until it's gone. Originally depicting a curved knife gouging out a hole. Together: taking a blade to the deepest, most permanent part of something and ripping it out entirely. You'll hear nekosogi (根刮ぎ) when someone takes everything without leaving a trace. A typhoon that strips a forest bare. A scandal that wipes out an entire career. Or more casually, someone cleaning out the fridge completely. 兄さんが持っているもの全部根こそぎもらいますよ。