This is the 106th most frequent Hebrew word.
הנשיא
The president.
Here, 'הנשיא' refers to the title of a formal figure leading a nation.
הנשיא נאם בפני העם.
The president delivered a speech to the people.
In this instance, 'הנשיא' refers to the designation of a leader of an organization.
הנשיא של אגודת הסטודנטים נבחר אתמול.
The president of the student association was elected yesterday.
In this example, 'הנשיא' is used as a general term for a distinguished leading person.