本当（ほんとう、hontou）
- truth

The Japanese word 本当 (ほんとう) primarily means "truth," "reality," or "really." It can function as an adjective, an adverb, or a noun, depending on the context. It expresses the idea of something being genuine, not false, or actually happening. It's a fundamental word used frequently in daily conversation to emphasize the validity or sincerity of a statement or situation. It can also imply surprise, doubt, or emphasis. The word's meaning revolves around the concept of accuracy and correspondence with facts.

⚫︎本当ですか？ Translation: Is it true? / Really? ⚫︎これは本当の話です。 Translation: This is a true story. ⚫︎彼は本当に忙しい。 Translation: He is really busy. / He is truly busy.

⚫︎When used as an adjective, 本当 modifies a noun, such as in "true story." ⚫︎When used as an adverb, 本当 emphasizes the degree of something, similar to "really" or "truly." ⚫︎It's frequently used to express disbelief, surprise, or confirmation. For instance, when someone tells you something surprising, you might respond with 本当？ to ask if it's true. ⚫︎You can use 本当に to mean "really," "truly," or "indeed." ⚫︎Be mindful of politeness levels; the degree to which you modify 本当 using polite forms (e.g., 本当でございますか) depends on your relationship with the person you're speaking to.

⚫︎本当 is most commonly written in kanji, 本当, but it can also be written in hiragana, ほんとう. ⚫︎The kanji 本 means "real" or "original", and the kanji 当 means "hit", "right", or "appropriate". Together, they form 本当. ⚫︎There is no variation in the okurigana when using the kanji form, it's always written 本当.

⚫︎真実 (しんじつ) - truth, fact (more formal) ⚫︎真 (まこと) - truth, sincerity (poetic or literary) ⚫︎事実 (じじつ) - fact (objective truth) ⚫︎本物 (ほんもの) - real thing, genuine article ⚫︎本当の類義語は、文脈によって異なります。

⚫︎嘘 (うそ) - lie ⚫︎偽り (いつわり) - falsehood ⚫︎虚偽 (きょぎ) - falsehood, lie (formal)

本当に美味しい！ ・Translation: It's really delicious! ・Explanation: Here, 本当に is used as an adverb to emphasize the degree of deliciousness.

本当の話ですか？信じられない。 ・Translation: Is it a true story? I can't believe it. ・Explanation: This uses 本当 to inquire about the truth of a statement, expressing disbelief.

The word 本当 originates from the combination of two kanji: 本 and 当. 本 originally meant “origin,” “root,” or “real.” 当 means "hit," "right", or "appropriate". Therefore, it reflects something hitting the mark of being real or the truth. This combination reflects the essence of truth and authenticity.