Afterwards, as he talked, Smerdyakov had been forgotten for the time; but still he had been in his mind, and as soon as Ivan parted with Alyosha and was walking home, the forgotten sensation began to obtrude itself again.
Some person or thing seemed to be standing out somewhere, just as something will sometimes obtrude itself upon the eye, and though one may be so busy with work or conversation that for a long time one does not notice it, yet it irritates and almost torments one till at last one realizes, and removes the offending object, often quite a trifling and ridiculous one—some article left about in the wrong place, a handkerchief on the floor, a book not replaced on the shelf, and so on.
There are no more uses of "unobtrusive" in the book.
Show samples from other sources
The web site has a lot of ads, but they are unobtrusively placed on the far right of the screen.