This is the 657th most frequent Finnish word.
miehiä
"Men" (partitive plural form of "mies").
The word 'miehiä' is the plural partitive form of 'mies' (man), used here to indicate an uncountable or indefinite number of men.
Kadulla on paljon miehiä.
There are many men on the street.
Here, 'miehiä' is used in the plural partitive form because it connects with a negation (ei tunne) which requires the partitive case.
Hän ei tunne miehiä kaupungista.
He does not know the men from the city.
In this context, 'miehiä' is in the plural partitive form, which aligns with the verb 'etsin' (I look for), as verbs of searching often take the partitive.