Impossible to resist; irresistible: resistless force; resistless love. (adjective)
Powerless to resist; unresisting.(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 "resistless" in a sentence
"His powerful left arm, driving the double-razor-edged dirk in short, resistless arcs, managed to keep the snaky tendrils from coiling about his right arm, which was wielding the heavy, trenchant sword."
"Little wonder, therefore, that his amazing eloquence was described as a resistless torrent."
"Hum, thou art damnable handsome to Night, Charles -- Ay, thou wilt do't; I see a kind of resistless Leudness about thee, a most triumphant Impudence, loose and wanton."