二十（にじゅう、nijuu）
- twenty

二十 (にじゅう) means "twenty". It's a compound word representing the number 20, the quantity of two tens added together. It is a fundamental number used in counting and expressing quantities.

⚫︎ 二十人 Translation: Twenty people. ⚫︎ 二十歳 Translation: Twenty years old. ⚫︎ 二十ページ Translation: Twenty pages.

You use 二十 just like you would use "twenty" in English. It's used when you want to express the number 20 in different contexts, such as counting, indicating age, or specifying a quantity. It can be used before a counter word.

二十 is typically written with the kanji 二十. The reading in hiragana is にじゅう. There are no other common ways to write this word. The okurigana is standard, with no variations.

There aren't exact synonyms for "twenty" in Japanese, as it is a specific number. However, you can use phrases that express the same quantity. ⚫︎ For example, 二の十 (にのじゅう), a less common way to say two tens

There is no direct antonym, since it is a number.

彼は二十歳で大学に入りました。 ・Translation: He entered university at the age of twenty. ・Explanation: This sentence uses 二十 to indicate the age of the person.

その本は二十章で構成されています。 ・Translation: That book is composed of twenty chapters. ・Explanation: 二十 here indicates the number of chapters in the book.

The word 二十 is formed from the combination of 二 (に, "two") and 十 (じゅう, "ten"). This construction is a direct translation of "two tens".