This is the 9455th most frequent Russian word.
убежден
Convinced; assured.
In this sentence, 'убежден' is used to express a strong belief or conviction about a specific decision.
Я убежден, что это правильное решение.
I am convinced that this is the right decision.
Here, 'убежден' demonstrates the state of being sure or certain about one's correctness or stance.
Он был убежден в своей правоте.
He was convinced of his correctness.
In this case, 'убежденным' (a form of 'убежден') reflects a firm commitment or advocacy for an idea.