Here's the breakdown:
* "Rendezvous" is actually a French word. It was adopted into English in the 16th century and has been used consistently since then.
* Loanwords are common. English, being a Germanic language, has borrowed words from other languages throughout its history, including French, Latin, Greek, and many more. This borrowing is part of what makes English so diverse and rich.
* "Rendezvous" is a specific case. This word has been used in English for centuries and has become so integrated that it's no longer considered foreign. It's not just a random French word that popped up; it filled a specific need in English, referring to a meeting or gathering.
In short, "Rendezvous" wasn't just adopted and reused – it was integrated into the English language and became a natural part of its vocabulary. This process happens all the time with words from various languages.