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These adjectives mean producing or capable of producing a desired effect: an effective reprimand; an effectual complaint; an efficacious remedy.
blockbuster Something extremely forceful, violent, or effective; a success, a winner, a hit. The term owes its origin to the name given the highly destructive bombs dropped on industrial targets in Britain during World War II.
corker A clincher or a sockdolager, something that settles the question or closes the discussion; also, a lollapalooza; something striking, astonishing, or extraordinary. In use since 1837, this slang term probably derives from the image of a cork “capping a bottle” (the first three meanings) or flying off a champagne bottle with a bang (the latter meanings). Corker was also a baseball term in the late 19th century.
haymaker Any extremely forceful or effective argument, statement, ploy, maneuver, etc., especially a decisive and culminating one. The term is boxing slang for a violent punch or knockout blow. Hay is grass or alfalfa which has been cut or mowed down. Similarly, the recipient of a haymaker in a pugilistic encounter is “cut down.” Mow (someone) down is a related expression.
I deliberately pulled my right back and swung “haymakers” at Choinyski, intending to miss him. (J. J. Corbett, Roar of the Crowd, 1925)
the old one-two Any especially effective combination of two persons or things; a double whammy. The reference is to boxing and the highly effective combination punch consisting of a left jab immediately followed by a hard right cross, usually to the opponent’s jaw and intended as a knockout blow.
put teeth into To make effective or enforceable; to give meaning or substance to. Webster’s Third cites a contemporary use by E. O. Hauser:
… started turning out the arms which would put teeth into neutrality.
The expression is most often used with reference to legislation.
sledge-hammer argument A single statement or ploy which completely dissolves the opposition in a disagreement; a clincher. A sledge-hammer is a large, weighty hammer which, if used as a weapon, can easily incapacitate the victim. This expression is heard infrequently today.
|Noun||1.||effectiveness - power to be effective; the quality of being able to bring about an effect|
power, powerfulness - possession of controlling influence; "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade"
efficaciousness, efficacy - capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine"
|2.||effectiveness - capacity to produce strong physiological or chemical effects; "the toxin's potency"; "the strength of the drinks"|