swimwear
n. uncountable A2 Elementary US //ˈswɪmˌwɛɹ// UK //swˈɪmweə// swimwear
n. clothing that you wear for swimming, like a swimsuit or swimming trunks.
n. clothing designed specifically for swimming or other water-based activities.
Don't forget to pack your swimwear for the beach.
The hotel shop sells a variety of swimwear for guests who forgot to bring their own.
Advances in textile technology have led to the development of professional swimwear that reduces drag and improves the performance of competitive athletes.
Usage
Uncountable; refers to the category of clothing rather than individual items.
Pitfall
I bought two swimwearI bought two pieces of swimwearSwimwear is uncountable; use 'pieces of' or 'items of' to count individual garments.