INGRAIN

I. transitive verb also engrain Date: circa 1641 to work indelibly into the natural texture or mental or moral constitution, see: infuse II. adjective Date: 1766 1. made of fiber that is dyed before being spun into yarn, made of yarn that is dyed before being woven or knitted, thoroughly worked in ; innate , III. noun Date: 1899 innate quality or character