horizon, shore, limit, bound

海の涯まで見えるほど晴れていた。

It was so clear that I could see to the horizon of the sea.

人生の涯までこの友情は続くだろう。

This friendship will last until the end of life.

世界の涯で彼は何を見つけたのか。

What did he find at the edge of the world?