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.
It inflicted upon Italy the ineradicable pal wars.
The Cuban coast was uninterruptedly full of infection, and the danger of an outbreak in each year was never absent, until the work of the United States army in 1901-1902 conclusively proved that this disease, though ineradicable by the most extreme sanitary measures, based on the accepted theory of its origin as a filth-disease, could be eradicated entirely by removing the possibility of inoculation by the Stegomyia mosquito.
But Charles's insatiable lust for conquest, and his ineradicable suspicion of Denmark, induced him, on the 17th of July, without any reasonable cause, without a declaration of war, in defiance of all international equity, to endeavour to despatch an inconvenient neighbour.
The temporary success of the Lombard league helped to strengthen the towns; but their ineradicable jealousy of one another soon.