appropriacy
noun [ U ] uk/əˈprəʊ.pri.ə.si/ us/əˈproʊ.pri.ə.si/
language specialized（措词的）准确性;得体性
the fact that a word or phrase sounds natural and is acceptable when used in a particular situation
Teachers aim to assess the appropriacy of the language used by their students in particular contexts. 老师们旨在评估学生在特定语境中使用语言的得体性。