flexible Antonyms

inflexible unswayable strait-laced stiff-necked stiff stern steadfast static starched stable splintery strict stringent unregenerated unmovable unlimber unflexible uncompromising unbending tyrannic tuff tight stubborn solid severe rebellious puritanic procrustean predetermined pig-headed piggish petrous perverse pertinacious refractory resistant resolute set semisolid sclerotic scissile rocky rigorous rigorist rigid rheumatic persistent virgate as stubborn as a mule rodlike