sleek
US /sliːk/
UK /sliːk/

1.
2.
(of a person) well-groomed and sophisticated
:
•
He looked very sleek in his new suit.
•
The company's new CEO is a sleek and confident leader.
3.
(of a machine or design) elegantly shaped and efficient
:
•
The new car has a very sleek design.
•
The smartphone's sleek profile makes it easy to hold.