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know one's business

ADJECTIVE

competent

Synonyms

STRONGEST

adequate capable decent efficient proficient qualified skilled

WEAK

adapted all around appropriate au fait being a pistol clever complete crisp dynamite endowed enough equal fireball fit fool good know ins and outs know one's stuff know the answers know the ropes know the score no slouch on the ball paid one's dues pertinent polished satisfactory savvy sufficient suitable there up to it up to snuff up to speed wicked

Antonyms

STRONGEST

impotent incapable incompetent inept insufficient unable unqualified unskilled unsuitable

WEAK

inadequate inefficient

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To qualify for promotion in any work, but more especially in the professions, one must know one's business.

From Opportunities in Engineering by Horton, Charles M. (Charles Marcus)

“One may be supposed to know one’s business best,” she replied rather dryly to this.

From Not Like Other Girls by Carey, Rosa Nouchette

know one's business

Example Sentences

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