Incapable of being changed; unalterable.(adjective)
Unyielding in purpose, principle, or temper; immovable.(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 "inflexible" in a sentence
"Many European diplomats have bad memories of Mr. Samaras for what they called his inflexible, ultra-patriotic stances as foreign minister in theearly 1990s."
"But we are likewise indeed far removed from the temper of three or four, even of one or two generations ago, in inflexible insistence that the inequality of classes shall preserve all its old ruthless consequence for individuals."
"This brings me to the issue of organised labour in South Africa, which has been described as inflexible and a barrier to investment in some quarters."