imperfective

/ˌɪmpərˈfɛktɪv/
adjective
  1. Describing a verb aspect that indicates an ongoing, repeated, or incomplete action, rather than a completed one.
    • In Russian, the imperfective aspect is used for actions that are in progress.
    • When learning Slavic languages, students must master the imperfective aspect.
    • The teacher explained that 'was walking' is an imperfective verb form.
Antonyms
What does "imperfective" mean? | whatsthatwordmean | whatsthatwordmean