Thesaurus.com Dictionary.com

know backwards and forwards

ADJECTIVE

able

Synonyms

STRONGEST

adept apt capable competent proficient skilled

STRONG

accomplished adroit effective experienced practiced qualified skillful talented

WEAK

clever facile know one's onions know the ropes masterful masterly savvy smart trained up to snuff

Antonyms

STRONGEST

incapable incompetent ineffective

STRONG

inept poor weak

WEAK

ignorant impotent useless

VERB

know by heart

Synonyms

WEAK

know by rote know inside out know like a book know one's stuff