unlettered

[ uhn-let-erd ]
/ ʌnˈlɛt ərd /

adjective

not educated; uneducated; untutored; ignorant.
not literate; illiterate.
not marked with letters, as a tombstone.

Origin of unlettered

Middle English word dating back to 1300–50; see origin at un-1, lettered
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for unlettered

unlettered

/ (ʌnˈlɛtəd) /

adjective

uneducated; illiterate
not marked with lettersan unlettered tombstone
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