instrument
n.
late 13c., "musical instrument," from Old French instrument "means, device; musical instrument" (14c., earlier estrument, 13c.) and directly from Latin instrumentem "a tool, apparatus, furniture, dress, document," from instruere "arrange, furnish" (see instruct). Meaning "tool, implement, utensil" is early 14c. in English; meaning "written document by which formal expression is given to a legal act" is from early 15c.
〔李〕[instru =to instruct教育，指导；-ment ⇒ “the means of in structing用来教育、指导之手段”→] n. a tool or device工具，器具；仪器，器械
〔李〕[in-;stru;-mentn.] n.仪表，仪器； 乐器 ←stru,struct (L struere,structum)=to build 建设