instrument
in-stru-ment
noun
A tool or device, especially for precise work, science, or making music.
"She played a musical instrument."
verb
To equip something with instruments for measurement, control, or observation.
"They instrumented the aircraft for testing."
noun
A person or thing used as a means to achieve a particular aim.
"He was an instrument of change."
Thesaurus
Synonyms: official document, legal instrument, legal document, instrumental role, tool, pawn, cat's-paw, instrumentate, musical instrument