sou
/suː/noun
1- historical a former French coin of low value〈史〉苏（法国旧时的一种低面值硬币）。
1.1
- usu. with negative informal a very small amount of money〈非正式〉极少量的钱：
he didn't have a sou.
他一文不名。
词源
French, originally as sous (plural), from Old French sout from Latin solidus （see SOLIDUS）.