inefficient

/ɪnɪfˈɪʃənt/

/ˌɪnɪˈfɪʃənt/

inefficient

not able to reach maximum productivity or produce desired results with minimum waste of energy, money, or time

antonyms : efficient

lacking the ability or skill to perform effectively; inadequate

Examples

1. The president won the election on his promise to get the economy into shape by overhauling outdated or inefficient legislation.

2. Conventional farming is inefficient.

3. Slavery is remarkably inefficient.

4. Spillage is inherently inefficient.