The 6-letter word meaning “a way of approach or entrance; passage” is access. It can describe a physical route into or toward a place, as in “the bridge provides access to the island,” or the entrance itself, as in “the building has wheelchair access.”
Access comes from Latin accessus, meaning “an approach” or “a coming near,” derived from accedere, “to approach.” It entered English through Anglo-French and Middle English, where it could refer not only to approach or entry but also to an onset of illness or a sudden emotional outburst.
In modern English, access has broadened beyond physical movement. It can mean permission or ability to use something—such as access to the internet, information, education, or a person. This sense explains why “access” can refer both to a doorway and to authorization.
A common mix-up is confusing access with excess. Access concerns entry, approach, or availability; excess means an amount beyond what is necessary or usual. The related verb is also access: to obtain, reach, or use something.