How to say "built-in" in Japanese

• 内蔵ないぞうCommon
  no-adjective, suru verb, transitive verbCovers a mechanism or feature housed inside a device — 'built-in' as in physically contained equipment. It also reads as 'internal' or 'equipped with', so the emphasis falls on what the machine carries inside.
• ビルトインCommon
  prenominal modifier, noun, suru verb, transitive verbThe loanword taken straight from English, so it keeps the English sense and works much as 'built-in' does in English — a safe pick when you simply mean that something comes as part of the unit.
• 組み込みくみこみCommon
  prenominal modifierThe technical, computing-oriented choice: it describes features that come predefined or embedded in software or a system, and it is the natural pick for that sense of 'built-in'.

Use 内蔵 for a mechanism or feature housed inside a device, 「ビルトイン」 as the direct loanword for the general English sense, and 「組み込み」 for technical contexts where something comes predefined or embedded in software.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 内蔵ないぞうinternal (e.g. mechanism, feature)
• ビルトインbuilt-in
• 作り付けつくりつけbuilt-in
• ビィルトインbuilt-in
• 定義済みていぎずみbuilt-in
• 組み込みくみこみbuilt-in