1) Bony 2) Fossilised 3) Fossilized 4) Inflexible 1) Changed into bone 2) Drunk 3) Fossilised, petrified 4) Hard 5) Hardened into bone 6) Hardened like or into bone 7) Turned into bone 8) Turned to bone 
• (a.) Changed to bone or something resembling bone; hardened by deposits of mineral matter of any kind; -- said of tissues. • (imp. & p. p.) of Ossify
Os'si·fied adjective Changed to bone or something resembling bone; hardened by deposits of mineral matter of any kind; -- said of tissues. 
[adj] - changed into bone
adjective changed into bone; hardened by deposits of mineral matter; `cartilages ossified with age`
hardened like or into bone. · drunk.