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know one's onions

ADJECTIVE
able
Synonyms
STRONGEST
adept apt capable competent proficient skilled
STRONG
accomplished adroit effective experienced practiced qualified skillful talented
WEAK
clever facile know the ropes masterful masterly savvy smart trained up to snuff
Antonyms
STRONGEST
incapable incompetent ineffective
STRONG
inept poor weak
WEAK
ignorant impotent useless
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