the.com/swimwear

means Clothing designed to be worn in water, especially for swimming or lounging at a pool or beach.

from A straightforward compound — 'swim' plus 'wear,' the same '-wear' that builds 'underwear' and 'outerwear.' The modern sense is a 20th-century development, arriving alongside the rise of public bathing and swimming as leisure activities, when the old heavy 'bathing costumes' gave way to smaller, water-practical garments that needed a tidier name.