Swanky (adjective)

1. Elegant and fashionable in appearance or behavior.
2. Impressively or showily smart.

Origin:

Derived from the word "swank" which is of uncertain origin, perhaps from low german or dutch swank "smart, spruce, showy".

Examples:

1. The guests were all dressed in their swankiest evening wear.
2. He was always very swank and well-groomed.
3. The new hotel was swanky and modern, with sleek lines and a minimalist aesthetic.
4. She was wearing a swanky new dress that she had just bought.
5. The party was swanky and had a red-carpet feel to it.