She saw only that he was quiet and unobtrusive, and she liked him for it.
Colonel Brandon’s delicate, unobtrusive enquiries were never unwelcome to Miss Dashwood.
Elinor paid her every quiet and unobtrusive attention in her power; and she would have tried to sooth and tranquilize her still more, had not Marianne entreated her, with all the eagerness of the most nervous irritability, not to speak to her for the world.
But here, Elinor could neither wonder nor blame; and when she saw, as she assisted Marianne from the carriage, that she had been crying, she saw only an emotion too natural in itself to raise any thing less tender than pity, and in its unobtrusiveness entitled to praise.
There are no more uses of "unobtrusive" in the book.
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The web site has a lot of ads, but they are unobtrusively placed on the far right of the screen.