English
instrumentarium
From instrument + -arium, originally after German Instrumentarium, itself after New Latin īnstrūmentārium.
Formed from instrument + -arium
Proto-Indo-European *strew- ‘to spread, strew’
…
Latin īnstruō ‘build, construct’
Latin īnstrūmentum ‘an implement, tool’
Old French instrument
Middle English instrument ‘a device used to produce music’
English instrument
Today it means
noun A set of instruments, a toolset.
Language periods are conventional ranges, not dates for this word.
Etymograph / instrumentarium