efficacious

When you really want to do something right, really nail it, really get at what you were going for — you're trying to be efficacious, or produce the effect you intended.

The word efficacious is made up of the Latin efficere meaning "accomplish" and the suffix -ious meaning "full of." Something that's efficacious is full of accomplishment. An efficacious medicine is one that cures you of the ailment you had. An efficacious recipe is one that comes out the way you intended it to taste. Remember that efficacious has two fs and two cs in it and you'll be efficacious in your spelling of the word.

Definitions of efficacious
1

adj marked by qualities giving the power to produce an intended effect

“"written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley”
“the medicine is efficacious in stopping a cough”
Synonyms:
effective, effectual
producing or capable of producing an intended result or having a striking effect
effective
works well as a means or remedy
Antonyms:
inefficacious
lacking the power to produce a desired effect
ineffective, ineffectual, uneffective
not producing an intended effect
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adj producing or capable of producing an intended result or having a striking effect

“an efficacious law”
Synonyms:
effective, effectual
hard-hitting, trenchant
characterized by or full of force and vigor
impelling
markedly effective as if by emotional pressure
impressive, telling
producing a strong effect
rough-and-ready
crude but effective for the purpose at hand
efficient
being effective without wasting time or effort or expense
potent, stiff, strong
having a strong physiological or chemical effect
powerful
having great power or force or potency or effect
useful, utile
being of use or service
Antonyms:
ineffective, ineffectual, uneffective
not producing an intended effect
idle
not in action or at work
toothless
lacking necessary force for effectiveness
unproductive
not producing desired results
inefficacious
lacking the power to produce a desired effect
inefficient
not producing desired results; wasteful
powerless
lacking power
useless
having no beneficial use or incapable of functioning usefully
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