海（うみ、umi）
- sea

The Japanese word 海 (うみ) means "sea" or "ocean." It refers to the large body of saltwater that covers a significant portion of the Earth's surface. It can encompass various aspects, including the water itself, the coastline, the life within it, and the overall maritime environment. The word 海 海 is often used in everyday conversation and in more formal contexts.

⚫︎海で泳ぐ Translation: To swim in the sea. ⚫︎海の魚 Translation: Sea fish. ⚫︎海は広いです Translation: The sea is vast.

⚫︎You can use 海 海 when talking about the sea in general, specific seas, or activities related to the sea. ⚫︎It's suitable for describing the sea's beauty, the animals living in the sea, or travel experiences involving the sea. ⚫︎It can be used in both formal and informal conversations.

⚫︎The standard way to write 海 海 is using the kanji 海. ⚫︎The hiragana reading is うみ. ⚫︎It is not typically written in katakana. ⚫︎There are no variations in okurigana for this word.

There aren't many direct synonyms for 海 in the sense of the sea itself. However, depending on context, you might use: ⚫︎洋（よう) - "ocean," often used in more formal contexts or when specifically referring to the open ocean.

There isn't a direct antonym for 海. However, words that represent the *absence* of sea or related concepts could be considered indirect antonyms: ⚫︎陸（りく) - "land," "shore." ⚫︎山（やま）- "mountain."

夏休みに海に行くのが楽しみです。 ・Translation: I'm looking forward to going to the sea during summer vacation. ・Explanation: This sentence expresses anticipation for a trip to the sea.

このレストランは、海の幸が美味しいです。 ・Translation: The seafood at this restaurant is delicious. ・Explanation: This sentence uses 海 in the context of food from the sea. The word 幸（さち) means "blessings" and 海の幸 means seafood.

The etymology of 海 海 is uncertain, but it's believed to be an old Japanese word. The kanji 海 is a phonetic loan from Chinese, where it also means "sea." The kanji originally depicted the appearance of waves.