Sentence:  One of the other ships found in the bay was a <WSD>knarr</WSD>, a type of ship the Vikings used for trading and exploring. The <WSD>knarr</WSD> was about the same length as the small longship, but it was much wider ...<WSD>Knarrs</WSD> were wider because that gave them more room for livestock and objects for trade. 
Meaning of the word marked with <WSD> tags:  A kind of Norse merchant ship used by the Vikings.