We have this as a sure and steadfast anchor of the soul, a hope that enters into the inner place behind the curtain, where Jesus has gone as a forerunner on our behalf, having become a high priest for ever after the order of Melchizedek.  (Hebrews 6:19-20)

Anchor is the transliteration of the Latin ancora, itself from the Greek ἄγκυρα agkura.  While the word is familiar enough, the usage in Hebrews is less obvious.