noun
undershirt
noun
1
A light, close-fitting garment worn under a shirt, next to the skin.
"He wore an undershirt to soak up sweat before putting on his dress shirt."
How to Use Undershirt
Learner’s notesIn plain EnglishA thin base-layer top worn beneath a regular shirt.
UK vs US
This is the standard American term; in British English it's more often called a "vest."
Word Forms
undershirts plural
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He wore an _____ to soak up sweat before putting on his dress shirt.
Etymology
From under- plus shirt.