The literal meaning of Arioso is "airy". In musical terms, it is a type of solo vocal piece during an opera or operetta, falling somewhere between recitative and aria in style. One of the most famous instrumental arioso was composed by Johann Sebastian Bach, and serves as the sinfonia of his cantata,
Listen, then politely tell her that is not in your scope. and you do not have an answer for her at this time. Hopefully the doctor can shed some more light on that subject.