a pointed iron implement used in separating the strands of rope in splicing, marling, etc.
Also mar·lin·spike, mar·ling·spike [mahr-ling-spahyk] /ˈmɑr lɪŋˌspaɪk/.
Origin of marlinespike
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
marlinspike less commonly marlingspike (ˈmɑːlɪŋˌspaɪk)
nautical a pointed metal tool used as a fid, spike, and for various other purposes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper