Could she mean "been engraved"
“Woman’s body serves as the space where social, religious, and cultural values are inscribed (quite literally in Hester’s case); moreover, it produces the very terms of that inscription: Pearl is the scarlet letter in human form” (Benstock: 397, quoting Hawthorne:90).
From the Wiktionary Intransitive grave To write or delineate on hard substances, by means of incised lines; to practice engraving. I don't know if this helps interpret that rather unusual use of the word! CJ
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