If an idea, system, or organization ossifies or if something ossifies it, it becomes fixed and difficult to change.
例句
It reckons that rationing would ossify the farm industry...人们认为实行配给制会使农业失去活力。British society tended to ossify and close ranks as the 1930s drew to their close.英国社会在20世纪30年代末期趋于保守和自闭。