sureness

nouns

freedom from doubt; belief in yourself and your abilities
"his assurance in his superiority did not make him popular"; "after that failure he lost his confidence"; "she spoke with authority"
assurance, authority, confidence, self-assurance, self-confidence, sureness
is derived from
sure
is derived from
sure
the quality of being steady and unfailing
"sureness of hand"
sureness
is derived from
sure
is a type of (narrower)
the quality of being steady or securely and immovably fixed in place
firmness, steadiness