One definition of suppletion is that it refers to the use of different roots within one paradigm.
One example is ἐσθίω (Present) and ἔφαγον (Aorist). Another example is ἔρχομαι (Present) vs. ἦλθον (Aorist). (In English, we have "go" and "went.")
These examples involve suppletion between two stems, the present and the aorist stems.
Are there examples involving suppletion within a stem, for example, between the Present and Imperfect?
