One way to hold this word: a door that does not open for you. A host who will not take you in, will not feed you, will not give you a chair — and a landscape that does exactly the same thing, with no shelter, no water and weather that pushes you back out. Both uses are the same refusal, once from a person and once from a place.
From Middle French inhospitable, from Medieval Latin inhospitabilis; by surface analysis in- (not) + hospitable (able to receive guests). The negative of a host-word is why both a person and a place can wear it.
來自中古法文 inhospitable、中世紀拉丁文 inhospitābilis；拆開來看就是 in-（不）加 hospitable（能接待客人的）。既然字根講的是「待客」，那麼一個人不待客、一片土地不留人，就都能用這個字。
Wiktionary etymology supplied in packet (kaikki:3f6f69a190036ae4:1098638782:9959)
Two branches
人不歡迎人
這一支就是字面本身：hospitable 是好客，加上 in- 變成不好客。
adjective · C1
Not welcoming visitors in a friendly way, and not offering them the food, help, or comfort a guest would normally expect. It is used about people, and also about groups, offices, and countries that treat the people who come to them coldly.
不好客的
地方不留人
把不歡迎人的那個主人換成一片土地，畫面就從屋子搬到荒野。
adjective · C1
If a place is inhospitable, it is hard to live in or even stay in for a while, because the weather there is harsh or because there is no shelter and nothing to live on.
不宜人居的