Non-intrusive is a term used to describe something that does not cause interruption or disturbance. There are several synonyms for this word, including unobtrusive, inconspicuous, subtle, discreet, and understated. Unobtrusive describes something that does not attract attention or interfere with its surroundings. Inconspicuous relates to something that is not easily noticeable or that blends into its environment. Subtle refers to something that is not obvious or noticeable but still has an impact. Discreet is used to describe something that is intentionally kept low-key or hidden. Understated refers to something that is presented in a subtle and restrained manner. All these synonyms accurately convey the concept of something that is non-intrusive.