She glanced at them a moment with the benign but vacant eye of the tired hostess, to whom her guests have become mere whirling spots in a kaleidoscope of fatigue; then her attention became suddenly fixed, and she seized on Miss Bart with a confidential gesture.
There are no more uses of "benign" in the book.
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She predicts benign economic conditions through next year.
She said she has the power to crush me, but is benign by nature and so will not harm me unless I make trouble.