Sentence:  I came in fine to the fourth part of the world, commonly called America, which by all deſcriptions I found to be an Iſland enuironed around about with the Sea, hauing on the Southſide of it, the <WSD>frete</WSD>, or ſtraight of Magellan, ... 
Meaning of the word marked with <WSD> tags:  (channel) A channel, a strait; a fretum.