adjective
producing or capable of producing a result
an effective rebuke
Synonyms: effectual, efficacious, efficient, virtuous
Related Word: adequate, capable, competent; cogent, compelling, convincing, sound, telling, valid; able, active, dynamic; operative, useful; direct
Contrasted words: abortive, bootless, fruitless, futile, vain; empty, hollow, idle, nugatory, otiose, pointless; inoperative, useless, worthless
Antonyms: ineffective