Quadruple VS
Synonym Boundary: "いい", "良い", "おやすみなさい", "得意な"
All represent the core concept "good", but require precise selection.
Japanese Option A
いい
いい (ii)
N5 / CEFR
Japanese Option B
良い
よい (yoi) / いい (ii)
N5 / CEFR
Japanese Option C
おやすみなさい
おやすみなさい (oyasuminasai)
N5 / CEFR
Japanese Option D
得意な
とくいな (tokui na)
N4 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "good" in Japanese, you must carefully distinguish between "いい", "良い", "おやすみなさい", "得意な" based on context.
- いい (いい (ii) - Level: N5): Maps to "good, nice; okay" and is used when An い-adjective, a versatile word meaning 'good,' 'nice,' 'fine,' 'okay.' Often used to express approval or agreement. The more formal or classical form is よい.
- 良い (よい (yoi) / いい (ii) - Level: N5): Maps to "good, nice" and is used when 「良い」.
- おやすみなさい (おやすみなさい (oyasuminasai) - Level: N5): Maps to "Good night" and is used when A polite farewell greeting used in the evening, especially when someone is going to bed or when parting ways late at night. A more casual version, おやすみ.
- 得意な (とくいな (tokui na) - Level: N4): Maps to "good at, strong in, one's forte" and is used when A な-adjective. Opposite of 苦手な. Used to express being good at something, or having a skill. Often paired with the particle が.
Context for "いい"
その考えはとてもいいです。/ 大丈夫、いいですよ。
That's a very good idea. / It's okay.
Context for "良い"
これは良い本です。
This is a good book.
Context for "おやすみなさい"
父に「おやすみなさい」と言ってから寝ました。
I said "Good night" to my father before going to bed.
Context for "得意な"
彼はスポーツが得意で、特に水泳が得意です。
He is good at sports, especially swimming.
Synonym Mastery Challenge
Which Japanese word perfectly fits this blank space?
Fill in the blank: "その考えはとても ＿＿＿ です。/ 大丈夫、 ＿＿＿ ですよ。" (Meaning: "That's a very good idea. / It's okay.")
🎉 Correct Answer!
Remember: "いい" is correct here because it represents "good, nice; okay" in the context: "That's a very good idea. / It's okay.".