It is beyond the horizon of present knowledge.
Some students take a gap year after finishing high school to broaden their horizons.
Word: "horizon"
the same meaning

When the pot comes to a boil, cover it and reduce the heat to medium.
The course covered all of Western Civilization.
Word: "cover"
different meanings

The new railroad will connect the northern part of the state to the southern part.
Our computers connected together.
Word: "connect"
the same meaning

The pit floor showed where a ring of post holes had been.
The room has a wooden floor.
Word: "floor"
different meanings