Smooth and lustrous as if polished
Having slender and graceful lines
Affectedly and self-servingly earnest
To give a gleaming luster to, usually through friction
To conceal or make light of a fault or offense
The animals were sleek and their black fur shined in the sunlight.
Toni held up a sleek phone and Bluetooth earpiece.
She ran her hand down his sleek neck and hugged him.
His bay gelding had the sleek lines of a racehorse and the look of endurance as well.
He led her through the apartment building to an underground garage and to a sleek, black sports car with black interior.