The phrase "unsettling effect" refers to something that makes you feel anxious, uncomfortable, or uncertain. It can disturb or disrupt your usual state of peace or stability. Full definition
Any conflict that occurs during your separation will have a particularly unsettling effect on them. (separatedfamilies.info)
i Reputedly the first American woman artist to paint a nude self - portrait, Barton deployed a garish realism, sometimes with a provocative touch of slick commercialism, for unsettling effect. (schwartzcollection.com)
The audio track aggressively mixes the eerie soundtrack, which makes use of classical pieces to as elegantly unsettling an effect as the original music, but dialogue remains clear and well separated from the score and Foley effects. (moviemezzanine.com)