liao3
ru2
zhi3
zhang3
  1. to know sth like the back of one's hand (idiom)
  2. to know (a person, a place etc) inside out

Characters

  • 了 (了): (completed action marker); (modal particle indicating change of state, situation now); (modal particle intensifying preceding clause)
  • 如 (如): as; as if; such as
  • 指 (指): finger; to point at or to; to indicate or refer to; to depend on; to count on; (of hair) to stand on end
  • 掌 (掌): palm of the hand; sole of the foot; paw; horseshoe; to slap; to hold in one's hand; to wield

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