self-as·sur·ance
noun/ˌself əˈʃʊərəns/, /ˌself əˈʃɔːrəns/
/ˌself əˈʃʊrəns/
[uncountable]- confidence in yourself and your abilities
自信的；胸有成竹的 - He radiated an air of calm self-assurance.
他浑身散发着平静自信的气息。
- He radiated an air of calm self-assurance.