en feckless (a)
― Antonym ⟶
Weight: 1.0
en effective Source: English Wiktionary
en fruitless (a)
― Antonym ⟶
Weight: 1.0
en effective Source: English Wiktionary
en futile (a)
― Antonym ⟶
Weight: 1.0
en effective Source: English Wiktionary
en effective (a)
― Antonym ⟶
Weight: 1.0
en ineffective Source: French Wiktionary