Yes, terribly is a word.
No, it's an adjective. The adverb form is terribly.
Terribly...
extremely
3. terr-ibb-ly
There are two adverbs in that sentence: "outdoors" and "terribly". "Outdoors" modifies the verb "go" and "terribly" modifies the adjective "cold".
undecide ( no such word im terribly sorry)
That is such a terrible thing to say.I had a terrible time thinking of this sentence.Ivan the Terrible was a truly awful person.The food tasted terrible.
Alliteration for toast
grim eerie fearful horrid unpleasant FIND MORE ON THERSAURUS.COM ON DICTIONARY.COM
The correct spelling of the word is atrocious(awful).
Get a shroud rapidly to me, please, I am feeling terribly cold.
The more socially acceptable term is trans woman or MtF. Or just a woman