This is the 3168th most frequent Russian word.
министерств
"Министерств" is the genitive plural form of "министерство," meaning "ministry" (a government department).
The word "министерства" is in the genitive singular form, indicating possession or association with something else, in this case, its building.
Я сегодня был в здании министерства.
I was in the building of the ministry today.
Here, "министерств" is in the genitive plural form, expressing association with multiple entities, the ministries.
Сотрудники министерств собрались на совещание.
Employees of the ministries gathered for a meeting.
The word "министерств" in this sentence is used in the genitive plural to indicate that the decisions belong or relate to the ministries.