IPA: /ˈæktɪvˌwɛr/
KK: /ˈæktɪvˌwɛr/
Clothing designed specifically for physical exercise or sports activities, often made from materials that are comfortable and allow for movement.
She wore her favorite activewear to the gym for her workout.
Activewear is formed from "active" (from Latin "activus", meaning to be in motion or to do) and "wear" (from Old English "werian", meaning to carry or to dress). The term refers to clothing designed for physical activity or exercise.
Think of 'active' meaning being in motion and 'wear' meaning to dress — activewear is clothing you wear for being active.
No commonly confused words.