i Register
In some senses, entrail is marked as archaic. Watch for register when choosing this word.
verb
To interweave or bind.
And in the thickest covert of that shade / There was a pleasant arbour, not by art / But of the trees' own inclination made, / With wanton ivy twine entrailed athwart, / And eglantine and caprifole among, / Fashioned above within their inmost part / That neither Phoebus' beams could through them throng / Nor AEolus' sharp blast could work them any wrong.
1598, William Cecil, letter to his son, reprinted in Annals of the reformation and establishment of religion, 1824, by John Strype, page 479, Trust not any with thy life, credit, or estate: for it is mere folly for a man to entrail himself to his friend; as though, occasion being offered, he shall not dare to become his enemy.
To outline in black.
A cross entrailed.
"Entrailed: outlined, always with black lines. See Adumbration, and Cross entrailed."