風邪（かぜ、kaze）
- cold

The Japanese word 風邪, read as かぜ (kaze), primarily means "a cold" or "a common cold." It refers to an upper respiratory tract infection, typically caused by a virus. It is characterized by symptoms such as a runny nose, sneezing, coughing, sore throat, and sometimes fever. The word can also refer to "the flu" or other similar illnesses, depending on the context. Sometimes 風邪 refers to the act of catching a cold or being sick with a cold.

⚫︎風邪をひきました。 Translation: I caught a cold. ⚫︎最近、風邪が流行っていますね。 Translation: Colds are going around a lot lately, aren't they? ⚫︎彼は風邪で学校を休みました。 Translation: He was absent from school due to a cold.

⚫︎You use 風邪 when talking about having a cold or being sick with cold-like symptoms. ⚫︎It's common to use it to describe your own illness or someone else's. ⚫︎You can also use it to talk about the spread or prevalence of colds in a certain area or season. ⚫︎When mentioning that you caught a cold, you may use the phrase 風邪をひく (kaze o hiku), which literally translates to "to catch a cold."

⚫︎The word is typically written with the kanji 風邪. ⚫︎The reading is かぜ in hiragana. ⚫︎It's not usually written in katakana. ⚫︎There is no variation in the okurigana.

⚫︎感冒（かんぼう - kanbou): This is another word for "a cold," often used in more formal contexts or medical settings. ⚫︎インフルエンザ (infuruenza): Influenza or the flu. Although not a direct synonym, it is closely related, as both are respiratory illnesses.

There aren't direct antonyms for 風邪, as it describes a specific illness. However, terms that imply good health or the absence of illness could be considered opposites.

昨日は少し寒かったので、風邪をひいてしまったみたいです。 ・Translation: It was a little cold yesterday, so it seems I caught a cold. ・Explanation: This sentence explains that the speaker believes they have a cold because of the cold weather.

熱があるので、たぶん風邪でしょう。 ・Translation: I have a fever, so it's probably a cold. ・Explanation: This sentence indicates that the speaker is experiencing a fever, leading them to suspect they have a cold.

The kanji 風 (kaze) means "wind," and 邪 (ja) means "evil" or "harmful." In this context, it is believed to refer to the idea that a cold is caused by an "evil wind" or a wind carrying harmful spirits or germs. It’s an old belief system.