IPA: /ɪnˈɡroʊs/
KK: /ɪnˈɡroʊs/
To take up someone's attention completely or to absorb them in something, often to the point of being unaware of anything else.
The movie was so captivating that it completely engrossed the audience.
Past: engrossed
Past Participle: engrossed
Engross is formed from "en-" (meaning to cause to be in) and "gross" (from Old French *gros*, meaning large or thick). The word means to cause something to be large or to occupy one's attention completely.
Think of being 'caused to be' ('en-') fully 'occupied' or 'large' ('gross') in your thoughts — that's why engross means to be fully absorbed in something.