cousin的复数到底是cousins还是cousinry

复数是cousins，例如：

1、I'm not sure of the exact relationship between them ─ I think they're cousins.我不太清楚他们之间的确切关系——我想他们是表亲。

2、We're cousins.我们是表亲。

3、At 15， he was more worldly than his older cousins who lived in the country.他15岁时就比他那些居住在乡村的表兄们懂人情世故了。