Webster's Revised Unabridged Dictionary · 1913

Engrail

Engrail , transitive verb

[French engrêler; pref. en- (Latin in) + grêle hail. See Grail gravel.]

1.
To variegate or spot, as with hail.
A caldron new engrailed with twenty hues. — Chapman
2.
(Heraldry) To indent with small curves. See Engrailed.

Engrail , intransitive verb

To form an edging or border; to run in curved or indented lines. — Parnell