insensitive
anneal
backed
brutalize
cake
calcified
calcify
callous
calloused
case harden
case-hardened
concrete
congeal
cornify
crusted
crusty
crystallized
dry
firm
fossilize
fossilized
granulated
harden
hardened
hornified
incrusted
indurated
inure
lapidified
lapidify
lithify
obdurate
ossified
ossify
petrified
petrify
reinforced
rigidified
sclerotic
set
solidified
solidify
steel
steeled
stiffened
strengthen
strengthened
change
indurates
indurating