dynamic

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dynamic
Both Uses of

porous
in
The Memory Keeper’s Daughter

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Definition:
allowing passage through a barrier
The barrier can be physical or figurative -- such as:
  • a membrane, asphalt or other material that is full of tiny holes that permit penetration by a fluid or gas
  • a border or other barrier that is not effective (for example, permitting illegal crossing)
  • an ineffective sports defense
  • a law or other rule that is full of loopholes