Final answer:
The synonym 'bizarre' has the most negative connotation, suggesting something strange or unsettling.
Step-by-step explanation:
In terms of negative connotation, the synonym 'bizarre' has the strongest negative association. It suggests something strange or outlandish, and is often used to describe things that are unsettling or disturbing. For example, a film with a bizarre plot could be one that is confusing or deeply disturbing.
On the other hand, 'eccentric' and 'unconventional' have milder negative connotations. 'Eccentric' implies unusual behavior or ideas that may seem odd or peculiar, but are not necessarily negative. 'Unconventional' simply means not conforming to usual customs or practices, and while it may not have a negative connotation on its own, it can potentially be viewed negatively depending on the specific context.
Learn more about Negative connotation of synonyms