The word "reached" is the past tense of the verb "reach." It means to arrive at a destination, extend your arm to touch something, or achieve a goal. It can refer to both physical and metaphorical distances, indicating that you have successfully gotten to a point or obtained something.
The word "reach" comes from the Old English "rǣcan," which means "to stretch out, extend." Its origins can be traced further back to Proto-Germanic "*rēkaną," which carries a similar meaning of extending or stretching towards.