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Synonym Nuance VS

How to say "Be" in Japanese

Both words can translate to "be", but which should you choose?

Japanese Option A

入院する

にゅういんする (nyūin suru)
N4 / CEFR Syllabus
VS
Japanese Option B

共通する

きょうつうする (kyōtsūsuru)
N3 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "be" into Japanese, you must choose carefully between 入院する and 共通する. In Japanese, 入院する (にゅういんする (nyūin suru)) is typically associated with "to be hospitalized" (Syllabus Level: N4) and represents Indicates the action of entering a hospital for medical treatment. Often refers to an extended stay.. On the other hand, 共通する (きょうつうする (kyōtsūsuru)) maps to "to be common; to share (something)" (Syllabus Level: N3) and represents Used when two or more people or things possess or share the same characteristic, interest, or quality. Can be used as a verb. A literal translation of "be" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "入院する"
祖父は先週から病気で入院しています。
My grandfather has been hospitalized since last week due to illness.
Bilingual Context for "共通する"
私たちには共通の趣味がある。
We have a common hobby.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "祖父は先週から病気で入院しています。" (Meaning: "My grandfather has been hospitalized since last week due to illness.")
🎉 Correct Answer!

Remember: "入院する" fits here because it means "to be hospitalized" in the context of: "My grandfather has been hospitalized since last week due to illness.". "共通する" represents "to be common; to share (something)".