undershirt
🇺🇸
/ˈʌndərʃɜːrt/
🇬🇧
/ˈʌndəʃɜːt/
A garment worn beneath a shirt to provide extra comfort or to wick away sweat.
He changed his undershirt after a long day at work.
他工作了一整天後換了一件汗衫。