"Harmless" Natural Recordings by Native Speakers
Harmless means not causing harm or damage; safe or inoffensive. It can also describe something that is non-threatening or not likely to cause trouble.
Harmful refers to something that can cause damage, injury, or harm to people, animals, or the environment. It describes an action, behavior, substance, or situation that poses a threat to well-being, safety, or health. Examples of harmful things might include toxic chemicals, addictive substances, unhealthy habits, or violent behavior.