同一の

dōitsu no

adjective★Intermediate

general

Identical or the same in nature, quality, or value.

同一の商品を二つ購入しました。

I bought two of the same product.

同一のパスワードを使い回さないでください。

Please don't reuse the same password.

💡

Often used to emphasize that two or more things are exactly alike.

Collocations

同一の内容same content同一の物the same thing同一の人物the same person

同一人物phrase

the same person

同一の場所phrase

the same place

While '同一の' is more formal, '同じ' is more commonly used in everyday speech.

'同一の' is typically used before nouns to indicate sameness, e.g., '同一の物' (the same thing).

From Chinese '同一' (tóngyī), meaning 'same' or 'identical'.

Often used in formal or technical contexts to emphasize exact equivalence. Can be used with nouns, verbs, or adjectives.

同

same

root

一

one

root

の

possessive particle

suffix

和英辞典