-stsuff. Variant of -est2.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.-st suffix a variant of -est2 Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-st , var. of -est2: dost; hadst; wouldst. St. 1. Saint. 2. statute. 3. Strait. 4. Street. st. 1. stanza. 2. state. 3. statute. 4. stet. 5. stitch. 6. stone (weight). 7. strait. 8. street. s.t. short ton. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.