三十一（さんじゅういち、sanjuuichi）
- thirty-one

三十一 (さんじゅういち) means thirty-one. It is a number representing the quantity of 31. It is formed by combining the numbers 三 (three) and 十 (ten) with 一 (one).

⚫︎テストは三十一問あります。 Translation: There are thirty-one questions on the test. ⚫︎私は三十一歳です。 Translation: I am thirty-one years old. ⚫︎その本は三十一ドルです。 Translation: That book costs thirty-one dollars.

三十一 is used in the same way as the number thirty-one in English. You can use it to: ⚫︎State your age. ⚫︎Indicate a quantity. ⚫︎Refer to a specific amount. ⚫︎Count items.

⚫︎The word is primarily written using kanji and hiragana: 三十一. ⚫︎三 represents "three," 十 represents "ten," and 一 represents "one." ⚫︎The reading is written in hiragana as さんじゅういち. ⚫︎There are no variations in okurigana for the number 三十一.

There aren't direct synonyms for the number 三十一. However, the meaning can be conveyed through other numerical expressions.

The antonym of 三十一 would depend on the context. If referring to quantity, the antonym could be a number smaller than 三十一 (e.g., thirty, twenty, one).

このバスは三十一番です。 ・Translation: This bus is number thirty-one. ・Explanation: This sentence uses 三十一 to refer to a bus route number.

今日は三十一日に、映画を見に行きます。 ・Translation: I'm going to see a movie on the thirty-first. ・Explanation: This sentence uses 三十一 as the date, which means "the thirty-first" in English.

The etymology is straightforward. It is derived from the way the Japanese language constructs numbers. 三 (san - three) + 十 (jū - ten) + 一 (ichi - one), literally means "three tens one."