Asigmatic Aorist

Some articles on asigmatic aorist, aorist:

Old Church Slavonic Grammar - Verbs - Asigmatic Aorist
... The asigmatic aorist (also called root or simple aorist) was named after the loss of the phoneme /s/ in the inflection (AGr ... Over time, the asigmatic aorist became increasingly marked as an archaic language feature and was eventually replaced by the other two aorist formations ... The asigmatic aorist was formed by adding to the infinitive stem of e-type verbs with stem ending in a consonant (i.e ...