Answer:
negligent, lazy, disorganized, late, aimless, and nonpersistent ruthless,
Explanation:
Conscientiousness is a personality trait which shows diligence and being careful. One who is conscientiousness does one's work or tasks well.
A person low in conscientiousness means that person does not dos hi duty or work in a proper way.
The synonyms are --
nonpersistent ruthless, lazy, negligent, late, disorganized, and aimless.