limit; border; river bank
to stretch as far as the eye can see (idiom)
Yao Xueyin (1910-1999), PRC novelist, author of historical novel Li Zicheng 李自成
boundless; vast
see 無邊無際|无边无际[wu2 bian1 wu2 ji4]
撒哈拉沙漠广袤无垠。
Sā hā lā Shā mò guǎng mào wú yín
The Sahara is a vast desert.