The antonyms for the word "more unassured" are numerous as this term is quite broad in its meaning. To start, you could use the word "confident" which means having no doubts or uncertainty about a particular situation. Other antonyms include "assured," which implies a sense of being certain about something, "certain," which means having no doubt, and "sure," which suggests a state of being confident in your beliefs or actions. Additionally, you could use antonyms such as "self-assured," "bold," or "assertive," which all connote a sense of self-confidence and assertiveness. Whatever antonym you choose, it must convey a contrast to "more unassured," implying a sense of security and conviction.