This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Prior to a surgical operation.

adj. In or relating to a Piagetian phase of child development characterized by sparse and logically inadequate mental operations and inability to reason or work with symbols.

"The Swiss psychologist Jean Piaget called it preoperational because it does not apply adult rules of logic."

prefire    pre-combat    semiformal    nonoperational    slit-eyed