Sentence:  Sand-<WSD>spits</WSD> are unfinished beaches, and long tongues or points of land, formed of sand and shingle, by the transporting action of currents and the waves. In Coldspring harbor, a sand-<WSD>spit</WSD> extends from the west shore, obliquely, nearly across. [...] The materials are transported by the currents and waves, and deposited to form this <WSD>spit</WSD>. 
Meaning of the word marked with <WSD> tags:  A generally low, narrow, pointed, usually sandy peninsula.