Inefficient

Origin

- + efficient

Full definition of inefficient

Adjective

1. Not efficient; not producing the effect intended or desired; inefficacious; as, inefficient means or measures.Celery is an inefficient food.
2. Incapable of, or indisposed to, effective action; habitually slack or remiss; effecting little or nothing; as, inefficient workers; an inefficient administrator.Jessica was terribly inefficient at cleaning, so her brother usually had to clean the whole room.

Antonyms

• efficient