ossified
turned into bone or bony tissue, or made rigid and unable to change through habit or convention
The committee's ossified thinking prevented it from adopting any innovative solutions.
More GRE words starting with O
a stupid, clumsy, or boorish person
stubbornly refusing to change one's mind or course of action
a gesture or attitude of deep respect or submission
showing deferential respect or submissive obedience
a tapering stone pillar with a pyramidal top, typically erected as a monument
grossly overweight to a degree that poses a health risk
to make something deliberately unclear or confusing
the act of making something deliberately unclear or confusing
Learn words the way the GRE tests them.
Vocabulary sticks when you meet it in real sentences. Practise these words inside text completion and sentence equivalence questions.