know inside out
Have total expertise
To know something inside out is to understand it thoroughly, with complete familiarity in every detail: She knows the tax code inside out.
The phrase suggests knowledge so comprehensive that nothing is hidden—as if you've examined something from every angle, interior and exterior alike.
Also phrased as know inside and out.
- familiarKnown from experience
- understandGrasp the meaning
- expertHighly skilled practitioner
- subject matter expertSpecialist in specific domain
- comprehendTo fully understand
thorough · exhaustive · well-versed · grasp · mastery · intimate · appreciate · down pat · proficiency · learned by heart · acquainted · back to front · adept · chapter and verse · conversant · practical · memorized · in depth
- Understanding Otherssee through, figure out, size up, empathize, put yourself in their shoes
- knowledgebook learning, encyclopedia, reference book, dictionary, thesaurus
- skill idiomscut the mustard, on the ball, sharp as a tack, jack of all trades, hit the ground running
know inside outunknowledgeable
Lacking awareness or expertise
scratch the surface · ignorant · uninformed · unaware · clueless
know, knows, known, knowing, knowingly, knowledge, knowledgeable, unknowing, unknowingly