I forgot to bring my bathing suit.
Why is Koichi wearing women's swimwear?
Do you have swimsuits? I’m looking for a super sexy one.
Water wear is a swimsuit, bathing suit, or swimwear.
The reading for this one is all kun'yomi vocab reading, but you should know these by now. 着 uses the reading you learned with the vocab word 着る, but this word employs that pesky rendaku, so remember that き becomes ぎ here.