Having no diacritical mark. Used of a word, syllable, or letter.(adjective)
Having weak stress or no stress, as in pronunciation or metrical rhythm.(adjective)
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 "unaccented" in a sentence
"The time-travel scenes are unconvincing: Will runs into a Viking who speaks by grunting noncommittally and runs into some seventeenth-century Brits who speak in unaccented modern English."
"When Fallows visited their home, he found adults returning from their daily commutes and children discussing their day’s studies in unaccented American English."
"Now India isn’t waiting, it is doing the more valuable mental work – in unaccented English."