This is the 739th most frequent Hebrew word.
וראש
The Hebrew word "וראש" means "and a head" or "and the head."
Here, 'וראש' ('and head') is used to describe a part of the body, referring to the head.
הוא חבש כובע וראשו היה מכוסה.
He wore a hat and his head was covered.
In this example, 'וראשיהם' ('and their heads') metaphorically represents leaders or main representatives of the topics.
האגודה עסקה בנושאים רבים, וראשיהם כללו את החינוך והסביבה.
The association dealt with many topics, and their leaders included education and environment.
'וראש' ('and the head') here refers to 'and Prime Minister', indicating the chief executive of a nation or organization.