All efficiency antonyms
ef·fi·cien·cy
E e noun efficiency
- idleness — the quality, state, or condition of being lazy, inactive, or idle: His lack of interest in the larger world and his consummate idleness were the causes of their dreadful divorce.
- inability — lack of ability; lack of power, capacity, or means: his inability to make decisions.
- ignorance — the state or fact of being ignorant; lack of knowledge, learning, information, etc.
- inadequacy — Also, inadequateness [in-ad-i-kwit-nis] /ɪnˈæd ɪ kwɪt nɪs/ (Show IPA). the state or condition of being inadequate; insufficiency.
- incompetence — the quality or condition of being incompetent; lack of ability.
- weakness — the state or quality of being weak; lack of strength, firmness, vigor, or the like; feebleness.
- incapacity — lack of ability, qualification, or strength; incapability.
- lack — something missing or needed: After he left, they really felt the lack.
- inefficiency — the quality or condition of being inefficient; lack of efficiency.
- disability — lack of adequate power, strength, or physical or mental ability; incapacity.
- ineffectiveness — not effective; not producing results; ineffectual: ineffective efforts; ineffective remedies.
- impotence — the condition or quality of being impotent; weakness.
- ineptness — without skill or aptitude for a particular task or assignment; maladroit: He is inept at mechanical tasks. She is inept at dealing with people.
- incapability — not capable.
- helplessness — unable to help oneself; weak or dependent: a helpless invalid.