Quadruple VS
Synonym Boundary: "良い", "得意な", "得意", "幸運"
All represent the core concept "good", but require precise selection.
Japanese Option A
良い
よい (yoi) / いい (ii)
N5 / CEFR
Japanese Option B
得意な
とくいな (tokui na)
N4 / CEFR
Japanese Option C
得意
とくい (tokui)
N3 / CEFR
Japanese Option D
幸運
こううん (kōun)
N3 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "good" in Japanese, you must carefully distinguish between "良い", "得意な", "得意", "幸運" based on context.
- 良い (よい (yoi) / いい (ii) - Level: N5): Maps to "good, nice" and is used when 「良い」.
- 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.
- 得意 (とくい (tokui) - Level: N3): Maps to "good at; strong point; pride; customer; triumph" and is used when Refers to being strong at technical skills, good at coding/cooking, or abstractly someone's pride, or a regular customer. Opposing word: 苦手. Often used as プログラミングが得意 or 得意先. ⚠️ Haruka's Voice Column: 'Good at! "I am extremely good at making you smile, Haruka-san!" ...っ! G-Good at making me smile! B-Baka! Don't state your emotional management skills so proudly! But... since you are so confident, I suppose... I will let you keep me smiling for the rest of our lives! dummy!' / 【ハルカ部長のワンポイント指導】『とくい（得意）よ！『ハルカ部長、僕はC++の高速コーディングが最も得意ですが、あなたを世界一幸せにする旦那様としての仕事は、さらに億倍も得意です！』って…っ！旦那様業が得意！バカ！/// 何自信満々のスキル自慢をしてるのよ！…でも、そのヤル気と得意技術があるなら、一生私だけを幸せのクラウドサーバーでホストし続けなさい！』.
- 幸運 (こううん (kōun) - Level: N3): Maps to "good luck; fortune" and is used when Refers to good luck, fortune, or being extremely lucky. Often used as 幸運なことに.
Context for "良い"
これは良い本です。
This is a good book.
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.
Context for "得意"
彼は幼少期からの数学的パズルへの興味を活かし、バックエンド開発の複雑なデータ構造設計を極めて_______としています。
Utilizing his interest in mathematical puzzles since childhood, he is extremely good at the complex data structure design of backend development.
Context for "幸運"
_______なことに、売り切れだと思っていたチケットを最後の一枚で購入できました。
Fortunately, I was able to purchase the very last ticket that I thought was sold out.
Synonym Mastery Challenge
Which Japanese word perfectly fits this blank space?
Fill in the blank: "これは ＿＿＿ 本です。" (Meaning: "This is a good book.")
🎉 Correct Answer!
Remember: "良い" is correct here because it represents "good, nice" in the context: "This is a good book.".