Diathesis

Diathesis (Greek: διάθεσις [f ] diathesis " Set apart ", " arrangement ", " state", not to be confused with: διάθεση [f ] diáthesi ) stands for:

Diathesis (linguistics), action role of sentence subject, often corresponds to it the grammatical distinction between active and passive (also called genus verbi )
Diathesis (medicine ), certain morbid affections of the organism (eg, bleeding )