いったい一体ittai
1.

A term used to express confusion or frustration about a situation, often emphasizing the speaker's disbelief about the circumstances or the actions of others.

2.

A phrase that implies a sense of pondering or questioning the fundamental nature of a matter, often used to inquire about something that seems perplexing or extraordinary.

3.

An expression that highlights the overall nature or essence of a group or concept, disregarding individual differences to discuss something as a whole.

4.

A word that can signify unity or a singular entity, as in referring to a collective group or a complete structure that cannot be easily divided.

Example:

一体どこで彼に会ったんだ。

いったいか一体化ittaika
1.

The process by which separate entities come together to form a cohesive whole, often used in contexts such as merging organizations or systems.

2.

A state of being unified, where diverse components operate harmoniously as a single unit, commonly referenced in discussions of collaboration between public and private sectors.

Example:

ノリもさる事ながら、会場と一体化したような快感が忘れられない。

いったいぜんたい一体全体ittaizentaiいったいittaiぜんたい全体zentai
1.

An expression used to convey strong disbelief or confusion regarding a situation, often implying that the speaker cannot comprehend what has occurred.

2.

A phrase that emphasizes a deep curiosity or frustration, questioning the reasoning behind an event or circumstance when faced with unexpected or puzzling outcomes.

3.

A rhetorical way to express exasperation or a sense of incredulity, used when the speaker feels that something unusual or surprising has happened and seeks clarification or justification.

4.

A term reflecting an overall assessment that disregards individual differences, commonly used in discussions or descriptions when talking about a collective scenario or common characteristic.

Example:

一体全体何故君がここにいるのだ?

さんみいったい三位一体sanmiittai
1.

A fundamental doctrine in Christianity that describes the unity of God as consisting of three distinct persons: the Father, the Son, and the Holy Spirit, who are all of the same essence and coequal in divinity.

2.

The concept that three entities represent different aspects of a singular whole, emphasizing harmony and collaboration among them, such as the partnership between family, school, and community in supporting a child's growth.

ひょうりいったい表裏一体hyouriittai
1.

The concept that seemingly opposing or contradictory elements are fundamentally interconnected and cannot be separated, illustrating a deeper unity despite their outward differences.

2.

A relationship where two aspects, often seen as oppositional, are fundamentally linked and reflect a singular reality, much like the dual nature of an object with both a front and a back.

3.

The idea that different perspectives or experiences can appear unrelated at first glance but actually share a profound connection, demonstrating that all things are interdependent at their core.

4.

The notion that two contrasting viewpoints or phenomena ultimately represent the same underlying truth, emphasizing that diversity often exists within a unified existence.