solidify
verb
[ səˈlɪdɪfʌɪ ]
• make or become hard or solid.
• "the magma slowly solidifies and forms crystals"
Similar:
harden,
go hard,
set,
freeze,
ice over/up,
gel,
thicken,
stiffen,
congeal,
clot,
coagulate,
curdle,
cake,
dry,
bake,
consolidate,
ossify,
fossilize,
petrify,
gelatinize,