ひみつ秘密himitsu
1.

The state of keeping certain information hidden from others, not shared publicly, often to protect sensitive matters or maintain discretion.

2.

An action characterized by being covert or discreet, typically involving private discussions or negotiations that are not disclosed to the general public.

3.

Knowledge or practices that are intentionally kept hidden, often regarded as mysterious or arcane, not easily accessible to outsiders.

4.

In a spiritual context, a profound truth or teaching that is difficult to comprehend and is deeply concealed, particularly emphasized in certain religious traditions.

Example:

私は彼女に取り入ってうまく秘密を聞き出した。

ひみつり秘密裏himitsuri
1.

A condition in which actions are carried out without public knowledge or awareness.

2.

An occurrence that takes place quietly and discreetly, away from the attention of others.

3.

An adjective describing situations that are intentionally concealed from outsiders, often implying a sense of confidentiality or privacy.

Example:

和平交渉がすでに秘密裡に開始されたとのことです。

ひみつきち秘密基地himitsukichi
1.

A place established in secrecy, often unknown to the public, serving as a covert operational hub for organizations or individuals.

2.

A secluded location created for clandestine activities, ranging from military operations to children's adventures, providing a sense of safety and privacy.

3.

A hidden sanctuary that allows individuals or groups to engage in activities away from the watchful eyes of society, fostering creativity or strategic planning.

Example:

月の裏側には秘密基地がある。

こうぜん公然kouzennoひみつ秘密himitsu
1.

A matter that is officially regarded as a secret but is widely recognized and known by many people.

2.

An issue or fact that is purported to be confidential, yet is common knowledge among a large group or community.

3.

A situation where something is claimed to be a secret, while in reality it is openly acknowledged and understood by most individuals involved.

ひみつかいぎ秘密会議himitsukaigi
1.

A gathering held in private where participants discuss confidential matters, often excluding outsiders to maintain discretion.

2.

A covert assembly intended for making plans or decisions that are not meant to be disclosed to the public or other groups.

3.

An event characterized by its secrecy, focused on sensitive topics that require a level of confidentiality among the attendees.