engrossyoudaoicibaDictYouDict[engross 词源字典]
engross: see gross
[engross etymology, engross origin, 英语词源]
engross (v.)youdaoicibaDictYouDict
c. 1400, "to buy up the whole stock of" (in Anglo-French from c. 1300), from Old French en gros "in bulk, in a large quantity, at wholesale," as opposed to en detail. See gross.

Figurative sense of "absorb the whole attention" is first attested 1709. A parallel engross, meaning "to write (something) in large letters," is from Anglo-French engrosser, from Old French en gros "in large (letters)." Related: Engrossed; engrossing.