Which word would describe an action that is without harmful intent?

The term "innocuous" is used to describe something that is harmless or not likely to cause any adverse effects. When an action is described as innocuous, it implies that there is no harmful intent behind it and that it will not result in danger or injury to individuals or situations. This makes it the ideal choice for expressing an action that is safe and well-meaning.

The other words in the list convey different meanings related to potential harm or disruption. For example, "invasive" often refers to something that intrudes or encroaches upon an area, typically with negative connotations. "Interfering" suggests an action that disrupts or obstructs another's efforts, which can indicate harmful intent or at least an unwelcome intrusion. Lastly, "infringing" refers to violating rights or limits, which again implies a potentially harmful or unwanted impact on someone or something. Thus, "innocuous" stands out as the term that most accurately characterizes an action devoid of harmful intent.