strict, stiff, nonmoving, unmoving, set, fixed, intolerant, unbending, unadaptable, inflexible, more...

flexible, pliable, supple, bendable, elastic

more, non, semi, plastic, akinetic, downward, universe

very strict,   stuck in their ways,   not flexible,   overly strict,   set in their ways,   made unyielding,   bend; inflexible,   tense body,   stuck in his ways,   set in one's ways