sneaker
n.a soft shoe with a rubber sole that people wear for sports or casual activities.
n.a soft-soled shoe designed for athletic or casual wear, typically constructed from canvas or synthetic materials with a rubber base.
“I need to buy a new pair of sneakers for the gym.”
“He wore white sneakers with his suit to give the outfit a more relaxed and modern look.”
“The rise of streetwear has transformed the sneaker from a functional piece of athletic equipment into a high-fashion status symbol often sold at significant markups on the secondary market.”
Commonly used in the plural; often referred to as 'trainers' in British English.
From sneak + -er. The shoes sense is a reference to the quietness of the shoes.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.