adjective. Having a firm belief in one's own powers: assured, confident, secure, self-confident, self-possessed.

What is the meaning of self assuredness?

uncountable noun. Someone who has self-assurance shows confidence in the things that they say and do because they are sure of their abilities. Synonyms: confidence, self-confidence, poise, nerve More Synonyms of self-assurance. COBUILD Advanced English Dictionary.

What does self assertiveness mean?

: very confident and willing to express opinions.