三十（さんじゅう、sanjuu）
- thirty

The Japanese word 三十 三十 means "thirty". It represents the number 30. It's formed by combining 三 (san), meaning "three," and 十 (juu), meaning "ten".

⚫︎ 三十歳 Translation: Thirty years old ⚫︎ 三十人 Translation: Thirty people ⚫︎ 三十分 Translation: Thirty minutes

三十 三十 is used in various contexts to denote the quantity or amount of 30. It can be used in counting, telling time, age, or describing a group of items.

三十 is written in: ⚫︎ Kanji: 三十 ⚫︎ Hiragana: さんじゅう There are no variations in the okurigana for this word.

There aren't many direct synonyms for 三十 in the same way as other words. However, other ways to express 30 include: ⚫︎　３０ - using Arabic numerals.

There is no direct antonym, but you could consider words related to smaller numbers, such as: ⚫︎ 二十九 (twenty-nine) ⚫︎ 二十 (twenty)

私は今年三十歳です。 ・Translation: I am thirty years old this year. ・Explanation: This sentence uses 三十歳 to state someone's age.

そのバスには三十人乗っていました。 ・Translation: Thirty people were on that bus. ・Explanation: This sentence uses 三十人 to describe the number of people on a bus.

The etymology of 三十 is straightforward. It is a compound word: 三 (san), which comes from Old Japanese and represents the number three, and 十 (juu), also from Old Japanese, which signifies ten. Combining these represents multiplication (3 x 10 = 30).