The word unkempt means untidy and messy.
The man had unkempt hair and raggy clothes.
Swelter means to be hot (take this seriously okay).
They began to swelter under the hot sun.
Precede means to come before something (in time).
The dark clouds precede a horrible storm.
Dictate means to determine something.
I must dictate what is shown on this script.
Trepidation means to have a feeling that something bad might happen.
I felt great trepidation when I left the house.
Desolate means deserted by people.
The desolate city was found two years ago.