Synonyms: effective, effectual, efficacious
Definition: producing or capable of producing an intended result or having a striking effect
Usage: an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation-LewisMumford; effective teaching methods; effective steps toward peace; made an effective entrance; his complaint proved to be effectual in bringing action; an efficacious law
Similar words: hard-hitting, trenchant
Definition: characterized by or full of force and vigor
Usage: a hard-hitting expose; a trenchant argument
Similar words: impelling
Definition: markedly effective as if by emotional pressure
Usage: impelling skill as a teller of tales; an impelling personality
Similar words: impressive, telling
Definition: producing a strong effect
Usage: gave an impressive performance as Othello; a telling gesture
Similar words: rough-and-ready
Definition: crude but effective for the purpose at hand
Synonyms: effectual, sound, legal
Definition: having legal efficacy or force
Usage: a sound title to the property
Similar words: valid
Definition: well grounded in logic or truth or having legal force
Usage: a valid inference; a valid argument; a valid contract