precondition

As verbs the difference between precondition and recondition

is that precondition is (medicine|biology) to condition in advance while recondition is to restore to a functional state, or to a condition resembling the original.

As a noun precondition

is a requirement which must be satisfied before taking a course of action.

As nouns the difference between precondition and postcondition

is that precondition is a requirement which must be satisfied before taking a course of action while postcondition is a condition that must be met immediately after execution of some piece of code.

As a verb precondition

is to condition in advance.