The meaning of “ἐστί”

“Then said he unto them, Therefore every scribe which is instructed unto the kingdom of heaven is like unto a man that is an householder, which bringeth forth out of his treasure things new and old.”

“Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam’s transgression, who is the figure of him that was to come.”

“And in nothing terrified by your adversaries: which is to them an evident token of perdition, but to you of salvation, and that of God.”

“And their word will eat as doth a canker: of whom is Hymeneus and Philetus;”

“For he received from God the Father honour and glory, when there came such a voice to him from the excellent glory, This is my beloved Son, in whom I am well pleased.”