Not to be named or identified: "We lived in dread of various unnameable calamities” ( Garrison Keillor). (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 "unnameable" in a sentence
"Odorants classified as unnameable were rated as significantly more difficult to name than odors classified as nameable."
"Whereupon this foreigner, who was clueless and careless enough to mention the occult, was showered with stories of varying levels of tragedy illustrating the cataclysmic powers of the 'unnameable', whose name still inspired fear."
"Odorants classified as unnameable and nameable were rated as equally intense (t (9) = 0.76, p"