肌着(はだぎ)

はだぎ
noun
underwear, undershirt
clothing
1. underwear, undershirt, undergarments
Clothing worn directly against the skin, under other clothes. Typically refers to undershirts, tank tops, or similar garments.
Cotton underwear is cool in summer.
I bought baby undershirts.
I changed my undershirt because I was sweating.
I wear warm undergarments in winter.
I wash my underwear every day.

肌着(はだぎ) literally means 'skin clothes': garments worn directly against the 肌(はだ) (skin). It is the usual word for babies' undershirts and for cotton undershirts worn to absorb sweat.

Similar words

Watch out

In everyday use 肌着(はだぎ) mostly means a top worn under a shirt; for underpants people say パンツ or 下着(したぎ).