先生（せんせい、senせi）
- teacher

The word 先生 先生 primarily means "teacher," "instructor," "master," or "doctor" in Japanese. However, its usage is much broader than just these direct translations. It's a title of respect used for people who have achieved a certain level of expertise or are in a position of authority. It is a title that reflects honor and respect.

⚫︎ 田中先生は数学の先生です。 Translation: Tanaka-sensei is a math teacher. ⚫︎ 医者の先生に診てもらいました。 Translation: I had a doctor examine me. ⚫︎ 山田先生は有名な小説家です。 Translation: Yamada-sensei is a famous novelist.

⚫︎ 先生 先生 is used to address or refer to individuals who are teachers, professors, doctors, lawyers, politicians, artists, writers, and anyone considered a respected figure in their field. ⚫︎ It's added after the person's name (e.g., Tanaka 先生) to show respect. ⚫︎ It is also used in the third person when talking about someone. ⚫︎ The word is always used with the person's name or title, and rarely used alone. ⚫︎ When addressing a teacher, it is more polite to use 先生 先生 than to use their given name.

⚫︎ The word is most commonly written in kanji: 先生. ⚫︎ The reading is せんせい in hiragana. ⚫︎ There is no variation in the okurigana.

⚫︎ 教師 (きょうし) - teacher (more formal and refers to the profession) ⚫︎ 教授 (きょうじゅ) - professor ⚫︎ 医師 (いし) - doctor (formal)

There aren't direct antonyms, as 先生 先生 is a title of respect. However, words that express a lack of respect or formality could be seen as opposites in a conversational sense.

英語の先生はとても親切です。 ・Translation: My English teacher is very kind. ・Explanation: This sentence demonstrates how 先生 先生 is used with a subject matter (English) to refer to a teacher of that subject.

彼は有名な音楽家なので、みんな彼を先生と呼びます。 ・Translation: Because he is a famous musician, everyone calls him Sensei. ・Explanation: This shows that 先生 先生 can be applied to many professions if the person is esteemed.

The kanji 先生 is composed of 先 (せん) meaning "before," "previous," or "ahead," and 生 (せい) meaning "life," "birth," or "to live." Together, they imply someone who has "gone before" or "lived before" in experience and knowledge, hence "teacher" or "master."