shouldst
should·est
(sho͝od′ĭst) or shouldst (sho͝odst)aux.v. Archaic
A second person singular past tense of shall.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
shouldst
(ʃʊdst) orshouldest
vb
archaic or dialect (used with the pronoun: thou or its relative equivalent) a form of the past tense of shall
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
shouldst
(ʃʊdst, ʃʊtst)also should•est
(ˈʃʊd ɪst)v.
Archaic. 2nd pers. sing. past of shall.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.