the first person singular present indicative; a prolonged form of a primary and defective verb; I exist (used only when emphatic):--am, have been, X it is I, was. See also εἶ, εἴην, εἶναι, εἰσί, ἦν, ἔσομαι, ἐσμέν, ἐστέ, ἐστί, κέρδος, ἴσθι, ὦ.