Answer:

ossify

Answer	Crossword Clue
OSSIFY	Harden
OSSIFY	Become bone-hard
OSSIFY	Turn into bone

OSSIFY	Harden into bone
OSSIFY	Become rigid
OSSIFY	Bone up?
OSSIFY	Become bony
OSSIFY	Get set in one's ways
OSSIFY	Turn to bone
OSSIFY	Harden, in a way
OSSIFY	Become inflexible

OSSIFY	Become callous.
OSSIFY	Become callous or set.
OSSIFY	Harden.
OSSIFY	Make rigid.
OSSIFY	Become hindbound
OSSIFY	Become fixed
OSSIFY	Become hardened
OSSIFY	Become rigid and inflexible

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.