congeal
verb 1
to become physically firm or solid <the surface of the pond congealed after several days of frigid temperatures> Related Words cake,
callus,
encrust (
also incrust);
clot,
coagulate,
gel,
gelate,
gelatinize,
jell,
jelly,
stiffen,
thicken;
calcify,
crystallize (
also crystalize),
ossify,
petrify,
rigidify;
anneal,
case-harden,
temper 2
to turn from a liquid into a substance resembling jelly <the gravy had already started to congeal by the time the waiter served our dinners> Related Words cake,
concrete,
firm (up),
fix,
freeze,
harden,
indurate,
solidify,
stiffen;
condense,
thicken;
clump,
curd,
curdle,
gum,
lump (up)
Seen & Heard 
What made you want to look up congeal? Please tell us where you read or heard it (including the quote, if possible).
