General terms:
* Style: This is the most direct and common way to express the idea of a particular way of doing something.
* Panache: This implies a distinctive flair or elegance in style.
* Flair: Similar to panache, this suggests a natural talent or ability for doing something with style.
* Swagger: This implies a confident and stylish way of moving or behaving.
Phrases:
* A certain je ne sais quoi: This French phrase literally means "I don't know what" and is used to describe an indefinable quality of charm or style.
* A certain something: This is a more general way to describe a quality that makes something distinctive.
* With a certain air: This suggests a particular manner or attitude that adds style.
Examples:
* "She has a style all her own."
* "He performs with panache and charisma."
* "The singer has a flair for the dramatic."
* "He walks with swagger, confident and stylish."
* "The dress has a certain je ne sais quoi that makes it so special."
The best way to spell it depends on the specific context and the nuance you want to convey.