反応（はんのう、hannou）
- reaction

The Japanese word 反応 (反応, はんのう) generally means "reaction," "response," or "to react." It can refer to a variety of situations, including: ⚫︎ A physical or chemical response to a stimulus. ⚫︎ A person's emotional or behavioral response to something. ⚫︎ The outcome of a process or event. ⚫︎ The results of something. ⚫︎ It can refer to both a verb (to react) and a noun (the reaction).

⚫︎ その薬は体に良い反応を示しました。 Translation: That medicine showed a good reaction in the body. ⚫︎ 彼女の提案に対して、彼らは肯定的な反応をした。 Translation: They gave a positive reaction to her proposal. ⚫︎ 化学反応が起こった。 Translation: A chemical reaction occurred.

You can use 反応 in various contexts, from scientific experiments to everyday conversations. ⚫︎ Use it when talking about how something or someone responds to a specific situation or stimulus. ⚫︎ You can use it to talk about both the act of reacting and the outcome of the reaction. ⚫︎ Often used with verbs such as する (to do), 示す (to show), 得る (to get), and 起こる (to occur).

反応 (反応, はんのう) is typically written using: ⚫︎ Kanji: 反応 ⚫︎ Hiragana: はんのう (used when the kanji is too difficult or unfamiliar) There are no significant variations in okurigana.

Some synonyms for 反応 include: ⚫︎ 返事 (へんじ): Reply, answer ⚫︎ 応答 (おうとう): Response, answer ⚫︎ リアクション (りあくしょん): Reaction (loanword from English) ⚫︎ 反響 (はんきょう): Echo, reverberation (can also mean reaction)

Some antonyms for 反応 might include: ⚫︎ 無反応 (むはんのう): No reaction, non-response ⚫︎ 無関心 (むかんしん): Indifference ⚫︎ 無視 (むし): Ignore, disregard

彼はその知らせに驚いた反応を示した。 ・Translation: He showed a surprised reaction to the news. ・Explanation: This sentence describes someone's emotional 反応 to a piece of information.

この実験では、特定の物質が混合されたときに化学反応が起きました。 ・Translation: In this experiment, a chemical reaction occurred when specific substances were mixed. ・Explanation: This sentence uses 反応 to describe the outcome of a scientific experiment.

The word 反応 is a compound word formed from: ⚫︎ 反 (はん): meaning "against," "opposite," or "back." ⚫︎ 応 (おう): meaning "respond," "answer," or "apply." Together, they create the meaning of "to react" or "a reaction".