Postulate

αξίωμα

axíoma

(something assumed without proof as being self-evident or generally accepted)

αξίωμα

axíoma

(logic: an axiom)

προϋπόθεση

proÿpóthesi

(requirement, prerequisite)

αξιώνω

axióno

(to demand or claim)

απαιτώ

apaitó

(to demand or claim)

αποφαίνομαι

apofaínomai

(to assume as a premise)