What? "Our wedding is not dear" is not accepted? "Dear" is obviously a synonym of "expensive", and although it's not ubiquitous, it's still fairly commonly used, especially in England. In fact, "dear" is the closest English word to the German "teuer". Surely this should be accepted.
They have the same base, but the ending changes depending upon what the case of the noun is before it and what position it is in the sentence. In this sentence, "Hochzeit" is feminine and is nominative , so "Unser" will have an "-e" ending. http://german.speak7.com/german_pronouns.htm
some germans here may agree with me:
"teuer" just sounded to me like she said "heuer".
"heuer" is bavarian and means "this year". So the answer would be "Our wedding is not this year."
That confused me just a little moment but I was pleasently surprised that bavarian is still stuck in my head although I've moved from bavaria 5 years ago.
in English, dear and expensive are synonyms yet only expensive is accepted