inflexible -- (incapable of change; "a man of inflexible purpose")
uncompromising, sturdy, inflexible -- (not making concessions; "took an uncompromising stance in the peace talks"; "uncompromising honesty")
inflexible -- (resistant to being bent; "an inflexible iron bar"; "an inflexible knife blade";)
inflexible, rigid, unbending -- (incapable of adapting or changing to meet circumstances; "a rigid disciplinarian"; "an inflexible law"; "an unbending will to dominate")
(Sound)
