IPA: /ˌʌndərˈdrɛst/
KK: /ʌndərˈdrɛst/
Not wearing enough clothing for the weather or not dressing appropriately for a formal occasion.
She felt underdressed at the wedding because she wore a simple dress instead of a fancy gown.
To wear clothing that is too casual or not formal enough for a particular occasion.
She felt out of place at the wedding because she was underdressed compared to the other guests.
Past: underdressed
Past Participle: underdressed
Underdressed → It is formed from "under-" (meaning below or insufficiently) and "dressed" (from Old French *dresser*, meaning to arrange or put on). The word "underdressed" means insufficiently dressed or not wearing enough clothing for a particular occasion.
Think of being 'below' ('under-') the expected level of 'dressing' — that's why underdressed means not wearing enough clothing.