yes
yes
No, the word overjoyed is not an adverb.The word overjoyed is an adjective.
Overjoyed (one word not two) means very happy.
The root word for "overjoyed" is "joy." The prefix "over-" is added to intensify the feeling of joy.
She was overjoyed to see the boy.
i was overjoyed when my team won the trophy
My dog is normally overjoyed to see me.
elated
overjoyed
· overjoyed
frantic overjoyed
Ovation, opulent, overjoyed