彼はがめつい性格で、何でも自分のものにしようとする。
He's a greedy type who tries to grab everything for himself.
あの店主はがめつくて、一円もまけてくれない。
That shop owner is so money-grubbing he won't knock off even a single yen.
そんなにがめつく稼いで、何に使うつもりなの？
What are you going to spend it on, raking in money so greedily?