“裤衩”常见的英文表达有 underpants / underwear / briefs。
underpants 的读音是 [ˈʌndəpænts]。例如:He was wearing a pair of old underpants.(他穿着一条旧裤衩。)
underwear 的读音是 [ˈʌndəweə(r)]。比如:She bought some new underwear.(她买了一些新裤衩。)
briefs 的读音是 [briːfs]。如:He prefers boxers to briefs.(比起三角裤衩,他更喜欢平角裤。)