Article II of the Constitution establishes the Executive branch of the federal government. It defines the office of President and Vice President, and an Electoral College to elect them.
Hemisphere originates from the Greek, and consolidates the prefix hemi-, which means "half" with sphere, or "completely round ball." Hemi-is the prefix, signifying "half of a sphere”.
Prefixes and suffixes are etymological components that are not autonomous words but rather that change the word root's significance. Prefixes are word parts that show up at the beginning of the word or base. Not every term have prefixes; but rather when introduce, prefixes make the significance more particular.