frozen, congeal, refrigerate
凍 centers on the idea of becoming solid from cold: freezing, congealing, or refrigerating something to preserve it.
凍 combines the ice radical 冫 with 東, which likely contributes the sound. The character expresses freezing or congealing through the idea of ice.
The ice radical 冫 on the left shows cold, and 東 on the right looks like a heavy weight. Imagine ice weighing down and freezing everything solid.
For トウ, picture a frozen toe: toe -> トウ. The ice radical 冫 makes your toe freeze solid.
freezing; cold storage; refrigeration
freezing (e.g. water)
to freeze; to become frozen; to freeze over
freezer
to freeze; to freeze over
thawing; defrosting
to freeze (of one's body); to be frozen; to become numb (with cold); to be chilled
death from cold; freezing to death
frozen soil
frostbite; chilblains
to freeze (to something); to be frozen (to)
to freeze
antifreeze; antifreezing solution
ice-free; anti-freeze
antifreeze protein
antifreeze
freeze protection valve
ice-free sea
ice-free port
cryonics