costume da bagno significa in inglese

swimming trunks▼(a pair of shorts or briefs worn for swimming or bathing)
noun
[UK: ˈswɪm.ɪŋ trʌŋks] [US: ˈswɪm.ɪŋ ˈtrəŋks]

swimsuit [swimsuits]▼(garment worn for swimming)
noun
[UK: ˈswɪm.suːt] [US: ˈswɪm.ˌsuːt]