inefficacious

adj.
Not capable of producing a desired effect or result; ineffective.

inefficaciously in·ef'fi·ca'cious·ly adv.
inefficaciousness in·ef'fi·ca'cious·ness n.

adjective

Not having the desired effect: ineffective, ineffectual, inefficient, useless. See affect/ineffectiveness.

Note: click on a word meaning below to see its connections and related words.

The adjective has one meaning:

Meaning #1: lacking the power to produce a desired effect
  Antonym: efficacious (meaning #1)

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Dansk (Danish)
adj. - virkningsløs

Nederlands (Dutch)
ondoeltreffend, ontoereikend

Français (French)
adj. - inefficace

Deutsch (German)
adj. - unwirksam, wirkungslos

Ελληνική (Greek)
adj. - αναποτελεσματικός

Italiano (Italian)
inefficace

Português (Portuguese)
adj. - ineficaz

Русский (Russian)
неэффективный

Español (Spanish)
adj. - ineficaz

Svenska (Swedish)
adj. - verkningslös, gagnlös

中文（简体）(Chinese (Simplified))
无效力的, 无用的

中文（繁體）(Chinese (Traditional))
adj. - 無效力的, 無用的

한국어 (Korean)
adj. - 효력 없는

日本語 (Japanese)
adj. - 効力のない

العربيه (Arabic)
‏(صفه) غير فعال‏

עברית (Hebrew)
adj. - ‮(תרופה) שאינה מביאה לתוצאה הרצויה‬

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