수영복이 · 수영복을
swimsuit, swimwear
Example
바다에 가려고 새 수영복을 샀어요.
I bought a new swimsuit to go to the beach.
Word parts
수 water+영 swim+복 clothes
수영 'swimming' + 복 'clothes': literally 'swimming clothes'.
Good to know
Many Koreans wear a 래시가드 'rash guard' at the beach for sun protection, and indoor pools usually require a swim cap (수영모) as well.
Related words