Firmly established by long standing
Forming an essential element, as arising from the basic structure of an individual
She wanted to wake up with his scent ingrained in her skin.
From the further use of "grain" for the texture of substances, such as wood, meat, &c., "engrained" or "ingrained" means ineradicable, impregnated, dyed through and through.
Pain and sin must have been reduced to a minimum by God; though they are so ingrained in the finite that we have to make up our minds even to the endless sin and endless punishments of hell.
The notion of scarcity is so ingrained in us and so permeates the world today, it is difficult to imagine a world without it.
The taking of fees, the pride of professional success, and the teaching of rhetoric are no proofs either of conscious charlatanism or of ingrained depravity.