内部
Meaning in Englishinterior, inside, internal
Animated kanji stroke order
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Word context
What it means
What does 内部 mean? It denotes the inside part of a thing or the internal aspects of a system, organization, or concept, contrasted with the outside.
Main meanings
- 1) Physical interior: the inner space inside a container, room, or building.
- 2) Internal to a system or organization: processes, information, or affairs not meant for public view.
- 3) Abstract core: the central or essential aspect of a concept.
- 4) Opposite of 外部: used to distinguish what is within from what lies outside.
How to use it
Used in formal, technical, and everyday contexts to indicate the interior of physical spaces, internal processes, or non-public information. In everyday speech it can refer to rooms or buildings, while in professional language it covers internal structure, systems, and internal communications.
Variants and close terms
- 内側 (うちがわ, uchigawa) — interior side
- 内在 (ないざい, naizai) — inherent, intrinsic
- 外部 (がいぶ, gaibu) — external, outside (antonym)
- 室内 (しつない, shitsunai) — indoors, inside a room
Composition
- 内: inside, within
- 部: part, section
Etymology
内 (nai) and 部 (bu) combine to form a Sino-Japanese compound. In compounds, the on'yomi reading is used, yielding naibu, and the two characters together convey the sense of the inside or internal part rather than their separate literal meanings.
Origin
Historically, the concept of 内部 emerged in classical Japanese and kanbun contexts to denote the interior of objects, later broadening to refer to internal affairs, structures, and abstract domains in modern usage.
Word class
Noun (名詞)