Wiktionary
nonintrusive
a. Not intrusive.
Usage examples of "nonintrusive".
And then waking in the later afternoon, I was myself, clearheaded, sharp, and the house was not only safely warmed by the fire, but he had put a few candles around, the thick kind, so that the corners had a dusty soft nonintrusive light.
His hands were clasped behind his back, which she had come to recognize as his nonintrusive approach.
They won’t use advanced but anachronistic surveillance techniques where nonintrusive ones that were available during the dark ages will do.