inefficient
adjective
1. not producing desired results; wasteful
- an inefficient campaign against drugs
- outdated and inefficient design and methods
Similar word(s): incompetent, ineffective, ineffectual, uneffective, uneconomical, wasteful
2. lacking the ability or skill to perform effectively; inadequate
- inefficient workers
Similar word(s): incompetent, ineffective
Sentences with inefficient as an adjective:
- Celery is an inefficient food.
- Jessica was terribly inefficient at cleaning, so her brother usually had to clean the whole room.