generated at
apparatus
ad- ‘towards’ + parare ‘make ready’

point What is the difference between apparatus and instrument ? | HiNative
>an apparatus has a specific purpose and it's complex, whereas an instrument is just a tool, like a hammer.

source: Kiki's mother. | animeとkawaii 、 colorful
noun (plural apparatuses)
1. the technical equipment or machinery needed for a particular activity or purpose:
〖集合的に〗(科学･医療などの)器具一式, 装置 (!数えるときはa piece of ～) ; C(1つの)器具, 装置
e.g. laboratory apparatus.
2. a complex structure within an organization or system:
〖通例単数形で〗(政治的な)機構, 組織
e.g. the apparatus of government.
3. (also critical apparatus or apparatus criticus) a collection of notes, variant readings, and other matter accompanying a printed text.

ORIGIN
early 17th century: Latin, from apparare ‘make ready for’, from ad- ‘towards’ + parare ‘make ready’.