Underwear
noun
The things you wear below your other clothes. That is your underwear. You do wear underwear, right?
したぎ
The reading for this one is all kun'yomi vocab reading, but you should know these by now. 着 uses the reading you learned with 着る, but this word employs that pesky rendaku, so remember that き becomes ぎ here.
下着売り場はあちらです。
The underwear section is over there.
最近は、私は下着はネットで注文することが多いです。
Lately, I often order underwear online.
おおっ、それって勝負下着？かっこいいね！
Oh, is that your special underwear? Looks cool!