Archaic Second person singular present tense of may1.(auxiliary-verb)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "mayest" in a sentence
"That thou mayest walk in the way of good men, and keep the paths of the righteous."
"“Unto a stranger thou mayest lend upon usury; but unto thy brother thou shalt not lend upon usury.”"
"For if ‘Thou mayest’ — it is also true that ‘Thou mayest not.’"