From the same as G5482; a graver (the tool or the {person}) that {is} (by implication) engraving ({[character]} the figure {stamped} that {is} an exact copy or [figuratively] representation): - express image.
From charasso (to sharpen to a point; akin to G1125 through the idea of scratching); a {stake} that {is} (by implication) a palisade or rampart (millitary mound for circumvallation in a siege): - trench.
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Heb 1:3Who being the brightness of his glory, and the express imageG5481 of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;