paralyzed
Icicles.
I don't believe there is a 3 letter word for fear in English. The closest would be 'awe' and that is not exactly the same meaning.
Phobophobia
the original meaning is a frozen dog
The root meaning of claustrophobia comes from the Latin word "claustrum" meaning enclosure or confined space, and the Greek word "phobos" meaning fear. Combined, it refers to the fear of enclosed spaces.
The Tagalog word for "fear" is "takot."
There is no such word in English.
The direness of the situation had him frozen in his place in fear
it means frozen
Fear is the root word.
hail
hoar