Summary of "deponent" verbs

Changing our categorization of -(θ)η- from the analogous English counterpart (passive) to a typologically attested middle form alters our view of Greek voice. Instead of seeing it as a passive marker with defective active outliers in an active-passive system, -(θ)η- is rightly treated as marking the less-transitive middle events—including passives—within a larger transitivity continuum in an active-middle system. The middle share of the space divides the labor across two morphological forms in the aorist and future compared to one in the present and perfect.—Rachel Aubrey in The Greek Verb Revisited