This is the 82nd most frequent Persian word.
هیچ
"هیچ" means "nothing" or "none."
In this sentence, 'هیچ' is used as part of the compound 'هیچ کس', meaning 'nobody', indicating the absence of people.
هیچ کس در خانه نبود.
Nobody was at home.
Here, 'هیچ' is combined with 'چیزی' to emphasize the negation, referring to 'nothing' or 'not anything'.
هیچ چیزی مهمتر از سلامتی نیست.
Nothing is more important than health.
In this case, 'هیچ' is coupled with 'وقت' to mean 'never', indicating a negation of any time frame.