General Meaning: "good", "well", "pleasant", "easy", "true", "beautiful"
* eulogy: A speech or piece of writing praising someone or something, typically someone who has died.
* euphoric: Feeling intense happiness and excitement.
* euphemism: A mild or indirect word or expression substituted for one considered to be too harsh or blunt.
* euthanasia: The practice of intentionally ending a life to relieve pain and suffering.
* euphony: Pleasant or agreeable sounds.
* eupepsia: A state of good digestion.
* euphoria: A feeling of intense happiness and excitement.
* eustress: Positive stress that is helpful and motivating.
* euthenics: The science of improving human living conditions.
More Specific Meanings:
* eulogy: A speech or piece of writing praising someone or something, typically someone who has died.
* eukaryotic: Relating to cells that have a nucleus.
* European: Relating to Europe.
* eureka: An exclamation of triumph or discovery.
* euphony: Pleasant or agreeable sounds.
* euphemism: A mild or indirect word or expression substituted for one considered to be too harsh or blunt.
* eustress: Positive stress that is helpful and motivating.
* eutectic: Relating to a mixture of substances that melts at a lower temperature than any of its components.
* euthenics: The science of improving human living conditions.
* eucalyptus: A type of evergreen tree.
Note: The prefix "eu-" can also be used in combination with other prefixes, such as "pseudo-" (e.g., "pseudo-euphoria").
This is not an exhaustive list, as there are many words with the prefix "eu-".