The concert was absolutely marvellous, and we all enjoyed it very much.

marvellous 是形容词，由名词 marvel（奇迹、奇妙的事物）加上形容词后缀 -ous 构成，意思是"极好的、令人惊叹的"。这个词带有强烈的赞美意味，比 wonderful 程度更深。