beanie
n. B1 Intermediate UK //bˈiːni// beanie
n. a soft hat with a round shape and a small opening for the ears. You usually wear it to keep your head warm in cold weather.
n. a soft, knitted hat with a rounded crown and a small opening for the ears. Often associated with casual or sporty attire.
He wore a red beanie to keep his ears warm.
The hikers packed several beanies in their gear to protect their heads from the mountain wind.
While the wool beanie was once a staple of winter fashion, modern versions often feature synthetic fibers designed to wick away moisture and provide better insulation.
From bean (“the head”) + -ie (diminutive suffix).