This is the 4694th most frequent Russian word.
единожды
"Единожды" means "once" or "one time."
In this sentence, 'единожды' refers to a single occurrence of solving a problem, emphasizing that it happened only one time.
Он решил этот сложный вопрос единожды и больше к нему не возвращался.
He solved this complex issue once and never returned to it.
Here, 'единожды' is used to indicate the singularity of the decision-making event.
Единожды приняв это решение, он более не сомневался.
Having made this decision once, he no longer doubted.
In this example, 'единожды' signifies the single instance of the action, highlighting its uniqueness.