This is the 11206th most frequent Korean word.
기저귀를
"기저귀를" means "diaper" in English.
Here, '기저귀를' is the object of the verb '갈아 주었어요,' meaning 'changed,' referring to the diaper that was changed.
아기가 계속 울어서 기저귀를 갈아 주었어요.
The baby kept crying, so I changed the diaper.
In this sentence, '기저귀를' is part of the clause '기저귀를 사용하는', meaning 'those who use diapers,' describing the subject 'babies'.
기저귀를 사용하는 아기들은 하루에 여러 번 갈아야 해요.
Babies who use diapers need to change them multiple times a day.
This usage of '기저귀를' refers to the object of the verb '잘못 입히면,' meaning 'put on incorrectly,' specifying the diaper being worn by the baby.