宇宙（うちゅう、uchuう）
- universe

The word 宇宙 (宇宙) means "universe," "cosmos," or "space." It refers to the entirety of space and time, including all matter and energy in existence. It encompasses everything from planets and stars to galaxies and the vast expanse between them. It can also refer to outer 宇宙.

⚫︎宇宙は広大です。 Translation: The universe is vast. ⚫︎ 彼は宇宙飛行士になりたいと思っています。 Translation: He wants to become an astronaut. ⚫︎宇宙の謎を解き明かしたい。 Translation: I want to unravel the mysteries of the universe.

⚫︎You use 宇宙 when talking about the cosmos, outer space, celestial bodies, or anything related to the physical universe. ⚫︎ It is appropriate in both formal and informal conversations.

⚫︎The word 宇宙 is primarily written with the kanji 宇宙. ⚫︎The reading is うちゅう in hiragana. ⚫︎There is no okurigana variation for this word.

There aren't many direct synonyms for 宇宙, as it refers to a specific concept. However, related terms could include: ⚫︎ 空間 (くうかん) - space ⚫︎ 星 (ほし) - stars ⚫︎ 銀河 (ぎんが) - galaxy

⚫︎ There is no direct antonym, as it represents a concept. But the opposite direction could be "inside" or "earth".

昨夜、望遠鏡で《宇宙を観察しました。》 ・Translation: Last night, I observed the universe with a telescope. ・Explanation: This sentence describes the act of observing the 宇宙, illustrating a common way the word is used.

科学者は《宇宙の起源について研究しています。》 ・Translation: Scientists are researching the origin of the universe. ・Explanation: This sentence illustrates the use of 宇宙 in a scientific context.

The word 宇宙 is a compound word. The first character 宇 represents "eaves," "roof," or "house." The second character 宙 represents "sky," or "space." Together, they metaphorically represent the entirety of the space under the roof of the sky, encompassing all existence.