General antonyms:
* Unethical: This directly contradicts the meaning of "ethos" by implying a lack of moral principles.
* Dishonesty: This suggests a lack of integrity and trustworthiness, which are core components of a strong ethos.
* Irresponsibility: This implies a disregard for values and principles, which are fundamental to ethos.
Contextual antonyms:
* Apathy: If ethos refers to a strong sense of community or purpose, apathy could be considered its opposite.
* Individualism: If ethos is about collective identity and values, individualism emphasizes individual needs and beliefs, which can be seen as contrasting.
* Chaos: If ethos signifies order and structure, chaos represents its absence.
It's important to consider the specific context of "ethos" to determine the most appropriate antonym. For example, if "ethos" is used to describe a company's culture, "toxic environment" or "lack of integrity" might be suitable antonyms.
Ultimately, the best antonym will depend on the specific meaning of "ethos" in your context.