assuredness

uncountable

The state or quality of being assured.

Japanese Meaning

自信 (自分の能力や判断に対する揺るぎない信頼) / 確信 (確かな信念・認識をもった状態)

Her assuredness in front of the audience calmed everyone's nerves.

観客の前での彼女の自信は皆の緊張を和らげた。

Sense（1）

The state or quality of being assured.

Near-synonyms: assurance, guarantee