He is very close to his nephew and often goes fishing with him.

nephew 是名词，指"侄子"或"外甥"，即兄弟或姐妹的儿子。这个词来自古法语 neveu，最终源自拉丁语 nepos（孙子、后代）。在英语中不分父系或母系，统称 nephew。