小氣

他們明明很有錢，卻從來顯得很小氣

They're clearly rich, but they always act so stingy.

別那麼小氣，請大家吃飯吧！

Don't be so cheap, treat everyone to a meal!

他小氣到連一杯咖啡都不願意請。

He's so stingy he won't even buy someone a cup of coffee.