Synonyms of the word

inefficient

• adj. Not efficient; not producing the effect intended or desired; inefficacious.
• adj. Incapable of, or indisposed to, effective action; habitually slack or unproductive; effecting little or…
• n. A person who cannot or does not work efficiently.

incompetent

• adj. Unskilled, lacking normally expected degree of ability.
• adj. Unable to make rational decisions, insane or otherwise cognitively impaired.
• adj. (medicine) an incompetent cervix is one that opens too early in pregnancy, provoking the baby to be born.
• n. A person who is incompetent.

ineffective

• adj. not having the desired effect; ineffectual.
• adj. lacking in ability; incompetent or inadequate.

ineffectual

• adj. unable or insufficient to produce effect; futile.
• adj. worthless.
• adj. weak, indecisive; lacking forcefulness.

uneconomical

• adj. Not economical.

wasteful

• adj. Inclined to waste or squander money or resources.
• adj. (obsolete) Uninhabited, desolate.