powerful

Something that's powerful displays, well, power. Your neighbor who just finished training to be a fireman probably looks much more powerful than he used to.

We use powerful for many different senses of "strong." A powerful medicine is very effective. A powerful politician has more influence than most politicians. A powerful dog could probably knock you down. If you're reading a book written in folksy Southern vernacular, someone might use powerful to mean "very," as in, "that was a powerful good supper, Miss Jackson," or "you look powerful good tonight."

Definitions of powerful
  1. adjective
    having great power or force or potency or effect
    “the most powerful government in western Europe”
    “his powerful arms”
    “a powerful bomb”
    “the horse's powerful kick”
    powerful drugs”
    “a powerful argument”
    Synonyms:
    effective, effectual, efficacious
    producing or capable of producing an intended result or having a striking effect
    potent, stiff, strong
    having a strong physiological or chemical effect
    all-powerful, almighty, omnipotent
    having unlimited power
    coercive
    serving or intended to coerce
    compelling
    driving or forcing
    mighty
    having or showing great strength or force or intensity
    muscular
    having or suggesting great physical power or force
    potent, strong
    having or wielding force or authority
    puissant
    powerful
    regent
    acting or functioning as a regent or ruler
    regnant, reigning, ruling
    exercising power or authority
    strong
    having strength or power greater than average or expected
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    Antonyms:
    powerless
    lacking power
    ineffective, ineffectual, uneffective
    not producing an intended effect
    impotent
    lacking power or ability
    feeble, nerveless
    lacking strength
    helpless, incapacitated
    lacking in or deprived of strength or power
    low-powered
    having little power to do work
    weak
    not having authority, political strength, or governing power
    weak
    wanting in physical strength
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  2. adjective
    strong enough to knock down or overwhelm
    synonyms: knock-down
    strong
    having strength or power greater than average or expected
  3. adjective
    (of a person) possessing physical strength and weight; rugged and powerful
    powerful arms”
    synonyms: brawny, hefty, muscular, sinewy
    strong
    having strength or power greater than average or expected
  4. adjective
    displaying superhuman strength or power
    synonyms: herculean
    superhuman
    above or beyond the human or demanding more than human power or endurance
  5. adjective
    having great influence
    synonyms: potent
    influential
    having or exercising influence or power
  6. adverb
    (Southern regional intensive) very; to a great degree
    “it is powerful humid”
    “that boy is powerful big now”
    synonyms: mightily, mighty, right
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