say it: MAHR-vuh-luh-slee
marvelously is an adverb meaning "(used as an intensifier) extremely well". It carries one recorded sense.
(used as an intensifier) extremely well
“her voice is superbly disciplined”
“the colors changed wondrously slowly”
intensifier
Definitions, synonyms and semantic relations for marvelously come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.