If he must dispense his balm of Gilead in nostrums and apothegms of dubious taste to restore to health a generation of unfledged profligates let his practice consist better with the doctrines that now engross him.
There are no more uses of "engrossed" in the book.
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She was so engrossed in her conversation, she didn’t realize the bell had rung.
he was growing quite inattentive to other people, and wholly engrossed by her.