How do you say avant-garde in English?

"Avant-garde" is already an English word. It's a French phrase that's been adopted into English and is used as a noun, adjective, or sometimes even as an adverb.

Here are some examples of how it can be used:

Noun: "The play was a work of avant-garde theatre."

Adjective: "She is known for her avant-garde fashion designs."

Adverb: "The artist was thinking avant-garde."

It's important to remember that "avant-garde" refers to something new, experimental, and often challenging to the status quo.