The phonetic transcription of "underthings" is /ˈʌndəθɪŋz/ in British English and /ˈʌndərθɪŋz/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "underthings": underwear, lingerie, underclothes.
Example usage of "underthings": "She bought new underthings for her trip.". More examples on the page.