εἴσω
εἴσω, ἔσω, used by Ep., Lyr., and Trag. Poets acc. as a spondee or iambus is required ; ἔσω (as ἐς for εἰς) prevailed in Ion. and old Att. Prose ; but in other Prose and in Com. εἴσω was the only form admitted, whereas ἔσωθεν with the Comp. and Sup. ἐσώτερος, ἐσώτατος, ἐσωτέρω, ἐσωτάτω, seem to have been the only forms in use :— Adv. of εἰς, ἐς,