虹（にじ、niji）
- rainbow

The word 虹 (にじ, niji) means "rainbow" in English. It refers to the meteorological phenomenon that is caused by reflection, refraction, and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.

⚫︎雨上がりに虹が出た。 Translation: A rainbow appeared after the rain. ⚫︎虹の色は何色ですか？ Translation: What colors are in a rainbow? ⚫︎子供たちは虹を見て喜んだ。 Translation: The children were happy to see the rainbow.

虹 is used to describe the colorful arc that appears in the sky after rain, or when sunlight passes through rain. It can be used in both formal and informal conversations. You can use it to talk about seeing a 虹, describing the colors of a 虹, or expressing your feelings about a 虹.

The word 虹 is primarily written using the kanji 虹. ⚫︎The reading is にじ (niji) in hiragana. ⚫︎It is not typically written in katakana. ⚫︎There are no variations in okurigana for this word.

There are no direct synonyms for "rainbow" in Japanese, as 虹 is the standard term. However, you might use descriptive phrases to describe a 虹, such as: ⚫︎七色のアーチ (nanairo no āchi) - "seven-colored arch" (referring to the arch shape and colors of a rainbow)

There are no direct antonyms for "rainbow." The opposite would be the absence of a 虹, or perhaps a different weather condition.

今日の午後は雨が降った後、空に美しい虹がかかった。 ・Translation: After it rained this afternoon, a beautiful rainbow appeared in the sky. ・Explanation: This sentence describes seeing a rainbow and emphasizes its beauty.

私は子供の頃から虹を見るのが好きだった。 ・Translation: I have loved seeing rainbows since I was a child. ・Explanation: This sentence expresses a personal feeling about rainbows, indicating a long-term affection.

The etymology of 虹 is not definitively known, but it is believed that the kanji 虹 represents the shape of a rainbow.