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synonym Comparative
おびただしい
VS
膨大な

Differences Between "おびただしい" and "膨大な"

Option A
おびただしい
Meaning
countless, enormous, immense (in number or quantity)
Reading
おびただしい (obitadashii)
Syllabus Level
N2
Practical Example
事故現場にはおびただしい数の野次馬が集まっていた。
An enormous number of onlookers had gathered at the accident scene.
Option B
膨大な
Meaning
enormous, vast
Reading
ぼうだいな (boudaina)
Syllabus Level
B2
Practical Example
これはとても膨大なですね。
This is very enormous, vast, isn't it?

Which one to use?

Select the correct Japanese word for this context

Which word fits this context: "(countless, enormous, immense (in number or quantity))"?
🎉 正解 / Correct!
使い分け解説:
- おびただしい: Used to describe a very large or overwhelming number/quantity of something, often implying a sense of being countless or vast. It has a slightly more literary or formal feel than 「とても多い」.
- 膨大な: Essential structural term in CEFR B2 vocabulary syllabus. (CEFR B2語彙シラバスにおける重要表現です。)
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