adj.

1. Not producing an intended effect; ineffectual: an ineffective plea.
2. Inadequate; incompetent: an ineffective teacher.

ineffectively in'ef·fec'tive·ly adv.
ineffectiveness in'ef·fec'tive·ness n.

adjective

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

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

The adjective has 3 meanings:

Meaning #1: not producing an intended effect
  Synonyms: uneffective, ineffectual
  Antonym: effective (meaning #1)

Meaning #2: lacking in power or forcefulness
  Synonyms: ineffectual, unable

Meaning #3: lacking the ability or skill to perform effectively; inadequate
  Synonym: inefficient

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Dansk (Danish)
adj. - ineffektiv, virkningsløs, udygtig, uduelig, ugyldig

Nederlands (Dutch)
ineffectief, inefficiënt, ondoeltreffend

Français (French)
adj. - inefficace, sans effet, terne, incapable

Deutsch (German)
adj. - unwirksam, wirkungslos, fruchtlos, untauglich

Ελληνική (Greek)
adj. - αναποτελεσματικός, ατελέσφορος, αλυσιτελής, άκαρπος, μάταιος, ανώφελος

Italiano (Italian)
inefficace

Português (Portuguese)
adj. - ineficaz

Русский (Russian)
безрезультатный, невыразительный, неумелый

Español (Spanish)
adj. - ineficaz, inútil, inefectivo

Svenska (Swedish)
adj. - ineffektiv, otillräcklig, oduglig, verkningslös, resultatlös

中文（简体） (Chinese (Simplified))
无效的

中文（繁體） (Chinese (Traditional))
adj. - 無效的

한국어 (Korean)
adj. - 무효의, 쓸모 없는, 무능한

日本語 (Japanese)
adj. - 無効の, 効果のない, 無力な, 役に立たない, 無能の

العربيه (Arabic)
‏(صفه) غير فعال‏

עברית (Hebrew)
adj. - ‮לא יעיל, לא אפקטיבי‬

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