ossify
Pronunciation:
/ˈɒs.ɪ.faɪ//ˈɑ.sə.faɪ/verb
Definitions
To transform (or cause to transform) from a softer animal substance into bone; particularly the processes of growth in humans and animals.
(animate) To become (or cause to become) inflexible and rigid in habits or opinions.
(inanimate) To grow (or cause to grow) formulaic and permanent.
To calcify.