四ㄙˋ海ㄏㄞˇ為ㄨㄟˊ家ㄐㄧㄚsìhǎi‑wéijiā

简四海为家

  1. 形容帝業宏大，占有四方，天下一家。後用以形容志向遠大，或比喻人漂泊不定，居無定所。例 「他常年在外旅行，四海為家，浪跡天涯」。

英to regard the four corners of the world all as home (idiom)​, to feel at home anywhere, to roam about unconstrained, to consider the entire country, or world, to be one's own