Final answer:
The term 'Nonmaleficence' correctly matches the definition of an obligation not to inflict harm intentionally, fundamental in medical ethics for both clinical practice and research.
Step-by-step explanation:
The term that matches the definition "Do no harm, or an obligation not to inflict harm intentionally" is Nonmaleficence. This principle, particularly relevant in medical and ethical contexts, is fundamental to clinical practice and research trials involving human participants.
It is one of the four main ethical principles, along with autonomy, beneficence, and justice, that guide the physician-patient and researcher-participant relationships. Nonmaleficence ensures that actions do not cause harm and any potential harms are considered and minimized.