2007, Almut Hintze, A Zoroastrian Liturgy: The Worship in Seven Chapters (Yasna 35—41), Otto Harrassowitz Verlag, page 240,
If the root meaning is iterative or durative, such as 'to go', the verb belongs to the imperfective aspect and forms a root present.

2012, David Holton, Peter Mackridge, Irene Philippaki-Warburton, Vassilios Spyropoulos (reviser), Greek: A Comprehensive Grammar of the Modern Language, Taylor & Francis (Routledge), 2nd Edition, page 286,
The imperfective aspect in Greek presents the action or state expressed by the verb either as a single but continuous event (progressively) or as a repetitive or habitual one.

2012, Zygmunt Frajzyngier, A Grammar of Wandala, Walter De Gruyter (De Gruyter Mouton), page 149,
Subject pronouns precede the simple form of the verb and the reduplicated form of the verb in the imperfective aspect.

Imperfective aspect

Meaning

Noun