grandson
US
UK grandson n: (son of [sb]'s child) (儿子的儿子)
SC 孙子 sūn zi
TC 孫子
TC 孫子
SC 外孙 sūn zi ，wài sūn(女儿的儿子)
Hanna's grandson takes care of her in her old age.
汉娜老了以后是孙子在照顾她。
great-grandson n: (son of [sb]'s grandchild)
SC 曾孙
great-great-grandson n: (son of [sb]'s great-grandchild)
SC 重曾孙