This is the 17664th most frequent Russian word.
уверенностью
Confidence.
In this sentence, 'уверенностью' refers to the manner in which the presentation was delivered, emphasizing confidence and self-assurance.
Он делал презентацию с уверенностью, завораживая свою аудиторию.
He gave the presentation with confidence, captivating his audience.
Here, 'уверенностью' denotes the trait or quality with which the individual approaches challenges, pointing to a composed and assured demeanor.
Даже в трудных ситуациях она справляется с уверенностью и профессионализмом.
Even in difficult situations, she handles them with confidence and professionalism.
In this context, 'уверенностью' highlights the characteristic shine of the answers provided, indicating a secure and certain attitude.