Formal is not a compound word.
The formal word for sister is "sibling."
No, formal is an adjective, the adverb is formally.
The formal word for grandmother in Portuguese is "avรณ."
what is another word for promise? A vow or an oath
Formal is an adjective.
Informal? semi-formal
Another word for a formal speech is an oration or a discourse.
A formal disapproval is a reprimand.
yes
"Occur" would work, however, happen is appropriate in most situations.
The word used to introduce a formal debate proposition is "resolved."