[In traditional grammars durative is named "present", durative past indicative "imperfect"]

6. [αν-] This kind seldom presents problems of lexical tracking down in the other phases; other stems appended

αἰσθάνομαι, αἰσθ(η)-

ἁμαρτάνω, ἁμαρτ(η)-

αὐξάνω, αὐξ(η)-

βλαστάνω, βλαστ(η)-

(ἀπ)εχθάνομαι, (ἀπ)εχθ(η)-     

ἱζάνω

κιχάνω, κιχ(η)-, κιχε-

Properly speaking ἱζάνω has reduplication in addition to the suffix αν-.

ὀφλισκάνω (stem ὀφλ-) combines the properties of 4. and 6.