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.
長い一日の仕事の後、彼は下着を換えた。