inefficace (général, effort)

ineffectual (a) (général)

ineffective (a) (général)

unsuccessful (a) (effort)

fruitless (a) (effort)

futile (a) (effort)

unfruitful (a) (effort)

abortive (a) (effort)

unlucky (a) (effort)

fallito (a) (effort)

mancato (a) (effort)

sbagliato (a) (effort)

inutile (a) (général)

vano (a) (général)

inefficace (a) (général)

frustrado (a) (effort)

fracasado (a) (effort)

fallido (a) (effort)

ineficaz (a) (général)

infructífero (a) (général)

unwirksam (a) (général)

ineffektiv (a) (général)

untauglich (a) (général)

erfolglos (a) (effort)

misslungen (a) (effort)

fehlgeschlagen (a) (effort)

onfortuinlijk (a) (effort)

niet succesvol (a) (effort)

vruchteloos (a) (effort)

ondoeltreffend (a) (général)

ineffectief (a) (général)

misslyckad (a) (effort)

förfelad (a) (effort)

fruktlös (a) (effort)

felslagen (a) (effort)

ineffektiv (a) (général)

utan effekt (a) (général)

verkningslös (a) (général)

abortado (a) (effort)

vão (a) [m.] (effort)

infrutífero (a) (effort)

infeliz (a) [f.] (effort)

mal-sucedido (a) (effort)

ineficaz (a) (général)