the.com/inflexible
The spine that never learned to bow, mistaking rigidity for strength.
means Unwilling or unable to bend, change, or compromise, whether describing a steel rod or a stubborn manager.
from From Latin inflexibilis, literally not-bendable: the prefix in- (not) clamped onto flectere, to bend, the same root that gives us flex.
Physical firstOriginally described materials, then leaked into personalities.
Engineering paradoxToo-rigid structures snap; flexible ones survive earthquakes.
Cousin wordShares roots with reflex, flexible, and deflect.