This is the 9620th most frequent Russian word.
хрен
Horseradish.
Here, 'хрен' is used literally, referring to the horseradish plant or condiment.
Я купил хрен для приготовления соуса.
I bought horseradish for making sauce.
In this context, 'хрен' is colloquial slang, referring demeaningly to an unknown or unimportant person.
Какой-то хрен занял моё место на стоянке.
Some guy took my spot in the parking lot.
Here, 'хрена' is used idiomatically in a negative construction to emphasize absence or lack.