τὸ ἓν καὶ τὸ ὂν πολλαχῶς λέγεται → the term being and the term one are used in many ways, one and being have various meanings, one and being have many senses
-η, -ο (AM ἄσειστος, -ον) σείω
1. αυτός που δεν σείεται, ο ακλόνητος
2. ο αδιατάρακτος, ο αμετάβλητος.