Watch the stroke order, then trace it yourself.

rancid smell, sour odor
stale water, spoiled liquid
spoiled rice, stale food
bad idea, lousy suggestion
His lousy suggestion made everyone work for nothing.
There's a rancid smell in the kitchen; open the window quickly.
The stale rice from yesterday can't be eaten; it's already spoiled.
Explore characters by relationship
Characters pronounced "sou".
Characters with radical "饣".