I had to keep guessing at the channel; I had to discern, mostly by inspiration, the signs of hidden banks; I watched for sunken stones; I was learning to clap my teeth smartly before my heart flew out, when I shaved by a fluke some infernal sly old snag that would have ripped the life out of the tin-pot steamboat and drowned all the pilgrims; I had to keep a look-out for the signs of dead wood we could cut up in the night for next day’s steaming.
There are no more uses of "discern" in the book.
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The second picture has more pixels, but the human eye can’t discern the difference.
She prays to discern good from evil in all of its disguises.