instrumentality
/ˌɪnstrʊmenˈtælətɪ/noun
(pl. -ies)［mass noun］
1- the fact or quality of serving as an instrument or means to an end; agency媒介：
a corporate body can act only through the instrumentality of human beings.
法人组织只能以人为媒介来发挥作用。
1.1
- count noun a thing which serves as an instrument or means to an end手段, 工具。