ἐστίν.[614 verses](3rd sg pres ind act) "Is" is eimi, which means "to be," "to exist," "to be the case," of circumstance and events "to happen," and "is possible." With the genitive object, the sense is "belongs to." It can also mean "must" with a dative. -- The verb "is" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics. With the genitive object, the sense is "belongs to." The word also means "to exist" and where it doesn't connect to characteristics or conditions is best translated that way. -- When the verb "to be" appears early in the clause before the subject, the sense is more like "it is" or, in the plural, "there are."