YOU SAID:
my pants have fallen down
INTO JAPANESE
ズボンが落ちた
BACK INTO ENGLISH
Pants fell
INTO JAPANESE
パンツ
BACK INTO ENGLISH
Underwear
INTO JAPANESE
下着
BACK INTO ENGLISH
Undergarment
INTO JAPANESE
下着
BACK INTO ENGLISH
Undergarment
That didn't even make that much sense in English.