This is the 13584th most frequent Russian word.
неважно
"Not important" or "it doesn't matter."
The word 'неважно' is used to express indifference or lack of importance regarding the statement.
Неважно, что он сказал.
It doesn't matter what he said.
Here, 'неважно' is used colloquially to describe feeling unwell or indifferent.
Мне стало неважно после той новости.
I started to feel unwell after that news.
In this sentence, 'неважно' contrasts something that is deemed unimportant with something important.