"Harmless" refers to something that does not cause any injury, damage, or adverse effects. It can describe actions, substances, or behaviors that are safe and pose no threat to individuals, animals, or the environment. For example, a harmless insect like a ladybug is beneficial to gardens and does not harm plants. In various contexts, the term can also apply to certain products or practices. For instance, harmless cleaning agents are designed to be safe for both users and the environment, minimizing risks associated with toxic chemicals. Overall, "harmless" conveys a sense of safety and non-threatening nature.