imperfect

adjective
1
containing faults or mistakes; not complete or perfect
ناقص, عیب‌دار, ناتمام, غیرکامل, دارای نقص
synonym flawed
noun
1
the form of a verb that expresses action in the past that is not complete. It is often called the past progressive or past continuous.
ماضی استمراری, ماضی ناقص, گذشته استمراری, گذشته ناتمام