(of a habit, belief, or attitude) Firmly fixed or established; difficult to change,
(of a habit, belief, or attitude) Firmly fixed or established; difficult to change
his deeply ingrained Catholic convictions
(of dirt or a stain) Deeply embedded and thus difficult to remove
the ingrained dirt on the flaking paintwork
deep-rooted: (used especially of ideas or principles) deeply rooted; firmly fixed or held; "deep-rooted prejudice"; "deep-seated differences of opinion"; "implanted convictions"; "ingrained habits of a lifetime"; "a deeply planted need"
(ingraining) inculcation: teaching or impressing upon the mind by frequent instruction or repetition
Being an element; present in the essence of a thing; Fixed, established