おむつ（おむつ、omutsu）
- diaper

The Japanese word おむつ refers to a diaper, a disposable absorbent garment worn by babies and young children (or adults with incontinence issues) to absorb urine and feces. It's a common and essential item for childcare. It can also refer to reusable cloth diapers, though the term is generally used for disposable ones in modern usage.

⚫︎赤ちゃんは毎日、おむつを替えます。 Translation: The baby has their diaper changed every day. ⚫︎おむつはどこで買えますか？ Translation: Where can I buy diapers? ⚫︎おむつが濡れてる。 Translation: The diaper is wet.

You would use おむつ when talking about diapers or the act of changing a diaper. It is commonly used in conversations about babies, childcare, and products related to infants. It is a very direct and commonly used word.

おむつ is typically written in hiragana. It is rarely written in katakana. There is no Kanji for おむつ that is commonly used.

There aren't many direct synonyms for おむつ. However, words or phrases related to the function of おむつ include: ⚫︎ 紙おむつ (kami omutsu) - disposable diaper (literally, "paper diaper") ⚫︎ 布おむつ (nuno omutsu) - cloth diaper

There are no direct antonyms for おむつ, but things related to not needing diapers might include: ⚫︎ トイレ (toire) - toilet (used by those who are potty-trained)

このおむつは、よく吸収しますね！ ・Translation: This diaper absorbs well, doesn't it! ・Explanation: This sentence praises the absorbent quality of the diaper.

おむつのサイズが合わなくなりました。 ・Translation: The diaper size no longer fits. ・Explanation: This sentence describes the need to change to a larger diaper size.

The etymology of おむつ is not definitively known. However, it is believed to be derived from the word 襁褓 (omutsu), referring to swaddling clothes. The term was likely adopted as a generic term for baby's undergarment used to absorb waste. The original word is no longer commonly used, and the kana version おむつ is used nowadays.