極ごく秘ひ

ご

く

ひ

Common wordJLPTN1Freq.FrequencyTop 20,000

Meanings

na-adjective, noun which may take the genitive case particle 'no', noun

Describes information, documents, or matters kept strictly confidential, often in official or organizational contexts.

〈事こと〉を極ごく秘ひにするto keep something top secret
その計けい画かくは極ごく秘ひにされた。
The plan was kept top secret.
〈事こと〉を極ごく秘ひで進すすめるto carry out something in secret
新しん製せい品ひんの開かい発はつは極ごく秘ひで進すすめられている。
The development of the new product is being carried out in secret.
極ごく秘ひ扱あつかいにするto treat something as classified/top secret
この文ぶん書しょは極ごく秘ひ扱あつかいにされている。
This document is being treated as top secret.

秘ひ密みつN3
秘密 is a general word for 'secret', while 極秘 stresses the highest, official level of confidentiality.
機き密みつ
機密 refers to classified information typically in military or corporate settings, whereas 極秘 is a stronger, more absolute term for secrecy usable in any context.
内ない密みつ
内密 describes doing something quietly and privately between a few people, while 極秘 implies an official, top-level classification of secrecy.
内うち々うち
極秘 implies top-secret, high-stakes confidentiality, while 内々 is milder and often just means 'not made public yet, kept among us'.

公こう開かいN1
公開 means to make something open or public, the direct opposite of keeping it 極秘 (top secret).
公こう然ぜんN1
公然 describes something done openly and known to everyone, contrasting with the hidden, restricted nature of 極秘.

Compound of 極 (ごく, 'extremely') and 秘 (ひ, 'secret').