imperfect
im-PER-fect
adjective
Not entirely perfect; having faults, flaws, or defects.
"Her understanding of the rules was imperfect."
noun
A verb tense indicating an uncompleted or continuous past action or state.
"The imperfect tense is often used for descriptions."
Thesaurus
Synonyms: fallible, frail, human, weak, faulty, corrupted, flawed, defective, irregular, blemished, corrupt, imperfectible
Antonyms: perfect