Webster's Revised Unabridged Dictionary · 1913

Engrain

Engrain , transitive verb

[Prefix en- + grain. Compare Ingrain.]

1.
To dye in grain, or of a fast color. See Ingrain.
Leaves engrained in lusty green. — Spenser
2.
To incorporate with the grain or texture of anything; to infuse deeply. See Ingrain.
The stain hath become engrained by time. — Sir W. Scott
3.
To color in imitation of the grain of wood; to grain. See Grain, transitive verb, 1.