Also, especially British, mar⋅vel⋅lous.
Origin: 1300–50; ME
merve(
il)
lous < MF
merveilleus. See marvel, -ous 
Related forms: mar⋅vel⋅ous⋅ly, adverb
mar⋅vel⋅lous⋅ness, noun
Synonyms:
1. wonderful. 2. wondrous, amazing, miraculous. 3. unbelievable.
Antonyms:
1. terrible. 2. commonplace.